Throughout my life in and around the motor industry I have been frequently disappointed at the lack of memory in the design and build of cars. Mistakes made years ago recur, and again. As if no-one keeps records of what works, and when someone new thinks of something, no-one says "been there, done that, didn't work because".
The most visible example is the rev counter counting in tens.
With a rev counter counting in tens, next to a speedo also counting in tens, and no consistency whether speedo to the left or right, new or occasional drivers sometimes confuse the two. We need to be able to read these at a glance, not have to think which is which every time. If you drive one car, you get used to it, but if hopping into several, it takes concentration. That concentration is better pointed at the road and traffic. Some cars are particularly difficult to differentiate.
So after a few years, the rev couonter goes back to single digits. Then later some designer puts it back to tens 'cuz it looks nicer'.
With a bit of thought I could probably come up with a list of such silliness, but I can't be bothered. Aren't you all pleased.