Monday, November 8, 2021

VW ID.4 test drive

I test drove a Model Y a while ago and liked it. I had been to a dealership to check out the Mach-E but didn't get a chance to test drive one. I've read a lot of negative reviews for the Mach-E (very low ground clearance comparable to a Mustang GT, only one key fob, complicated cooling system likely to cause problems as the car ages, etc.). I had seen a lot of good press for the ID.4 and had been wanting to try it. The nearest dealer is 25-30 min away in heavy traffic so I really needed to set some time aside to go in for a test drive. I finally made it in last weekend.

The demo car the dealer had was a RWD Pro S with Gradient Package (20" wheels).  Here are my thoughts on the car and also some comparisons to my 2019 Acura RDX and the Tesla Model Y.

Things I liked:
  • Ride quality. Soaks up road imperfections really well. Better than RDX for sure and also better than the Model Y I test drove.
  • The steering feel is great. The RDX steering has a bit more of an artificial feel to it especially when making low speed turns.
  • The seat padding and overall seat comfort was excellent. I want to say I liked the seat padding better than the RDX's.
  • The exterior and interior design. Simple, tasteful and functional.  
  • I like the normal door handles better than the fancy-but-likely-to-pinch-if-not-careful handles that Tesla uses on the Model 3 and Y.  (Tesla uses different handles on the S & X.)
  • The quality of materials is about as expected for this class.
  • It drives like a normal car unlike the Tesla which uses very aggressive regenerative braking.
  • The visibility is excellent, unlike both the RDX and the Model Y.
Things I didn't like:
  • Road noise is pretty bad. I didn't even take it on the highway and I found it quite noisy even at 50 mph. It felt noisier than the RDX, and the RDX does a pretty bad job when it comes to noise.
  • The range of seat height adjustment is a tad less than I would like. Because of back issues, I prefer to sit as high up as possible.
  • The center armrest has a split design which felt kind of cheap.
  • The location of the wireless charger is such that you'd have trouble seeing the phone's display when it's there.  Model Y really shines in this regard.
  • I would have liked an opaque shade for the panoramic glass roof.  The Model Y doesn't have a shade.  The ID.4 has one, but it's a sort of fine mesh type of material and so it's not 100% opaque. I also don't think the glass that VW uses does as good a job at rejecting heat as the Model Y.  It was pretty nippy outside and yet I could feel a lot of heat through the glass and shade.
  • There are some weird design quirks like no dedicated buttons for the rear windows--they use the same buttons for fronts and rears with a selector, difficult to decipher controls, etc.
I didn't really push the car in terms of acceleration. And I didn't play with the infotainment at all (the infotainment is a low priority item for me).

Overall, I was quite impressed with the ride quality. I thought it soaked up road imperfections much better than the Model Y and also much better than the RDX on 19" wheels. The dealership is surrounded by really bad roads and both on the drive in and out I could tell my RDX did much worse.   However, I still don't think I liked it enough to want to get one.  If it came down to a choice between the Model Y and the ID.4, I think I'd pick the Model Y.

Friday, October 8, 2021

Peak technology

I am of the opinion that we have reached the peak of technology that benefits people at large.  From here on out almost all technological developments will be in the area of mass surveillance--monitoring driving, consumption habits, health, etc.  I'm not sure how this information will be misused, but misused it will be.

Technology is continuing to be abused in many ways.  AI is imperfect and will adversely impact the lives of those that are incorrectly classified as false positives in whatever the AI program is looking for.  This is likely to cause a lot of pain for those people.

Friday, June 11, 2021

PWM, temporal dithering and headaches with newer Apple displays

iPhones

Most new smartphones use a display technology called OLED.  These displays use a technology called PWM (pulse width modulation) for dimming the display.  This creates a flicker, which while not perceptible to the eye, can cause all kinds of symptoms -- headaches, nausea, etc.  Every time I have tried the newer iPhones with OLED displays in the store, I find I immediately feel eyestrain.  This has kept me from buying one of them and I have stuck to an iPhone with the older display technology called LCD.

If you have had issues with newer phones, you might be sensitive as well.  This article sums up the problem nicely.

PWM may not be the whole issue.  There's also scrolling speeds, addressed to some extent by ProMotion in some newer iPhones, and also temporal dithering.  More on temporal dithering below.

MacBooks

With newer MacBooks, a small, but not insignificant, number of users, including myself, have experienced really bad headaches when using them.  A few things that I did to try and mitigate the problem included turning off true tone, turning off auto brightness, and turning off dimming when running on battery.  None of these helped.

Digging deeper, I discovered that there's a feature called temporal dithering that Apple implements in order to render a larger number of colors than the display is natively capable of.  Unfortunately there is no way to turn this off using native controls in macOS.

In some of the forums, it was suggested that SwitchResX is an app that can be used to disable temporal dithering by setting the display to render millions of colors rather than billions of colors which is the default.

Another useful tool for checking various aspects of displays such as pixel inversion is the Lagom LCD monitor test pages.  Testing side by side with a Dell XPS, the M1 MacBook Air showed noticeably more flicker.

Finally, Iris is another tool attempts to get around PWM with laptops by using an app to control brightness and filtering colors in a way that makes the display experience easy on the eyes.

References