The fact that there are all sorts of different systems (good or otherwise) does mean that each new car comes with a big earning curve. This is what caught me out so badly with my hire car.
Time was you just needed to check: indicators, wipers, lights. Cars could differ as to what was on the control stalk(s) Everything else should be in a standard position. Possibly fuel cap release and heating/aircon too and maybe quirky ways of selecting reverse. Took less than a minute or so.
If I ever do hire a car again (and last week really put me off) I'll need to make a checklist and spend maybe 15-30 mins running through it before starting. And if you don't even know which intrusive systems exist, you don't know that you need to disable them.
The encroachment of automatics and electric cars is another concern. I wouldn't have a clue how to drive either of those, and I bet they aren't standardised.