They put a weight on the wheel to actively defeat the countermeasures. At best you can say that Tesla didn't do a good enough job by using multiple signals to determine driver occupancy and attention. Beyond that, this is just obvious.
I don't understand why you or others think it's fine just because somebody found a trivial way to defeat their checks. This is a severe public safety issue, since it's not just putting the occupants at risk.
Do you also believe it's up to publishers to control how their cryptography libraries are used, and firearms manufacturers to predetermine each and every end user that will lay a finger on their products?
Nothing between basic driver's assist and L4. You can argue whether Tesla is in that range but that's definitely what their messaging is.
(However, I think the problem with planes *could be* handled by changing the currency definitions. Time spent in L4 shouldn't count towards being current--and I wouldn't count time spent simply cruising at altitude, either. Only time where the pilot actually has to fly, whether simulator or a real bird.)