I have tested this and they are very capable, replacing the modern windows calc (38mb mem) with an identical app (ux, looks, features, accessibility, localization) ended up with an app using 2MB memory.
You just need to point it in the right direction (c/rust/go etc) and be harsh with the requirements, especially memory usage.
If I was Microsoft I would use AI for this rather than badly embedding AI everywhere, a lot of power users would be overwhelmed by a win 11 update where OS apps/features dropped mem usage by 90%+
They kind do if you prompt them, I had mine reimplement the Windows calc (almost fully feature complete) in rust running with 2mb RAM instead of 40mb or whatever the win 11 version uses as a POC.
A handwritten c implementation would most likely be better, but there is so much to gain from just slaughtering the abstraction bloat it does not really matter.
Last maintenance I did on my Volvo was to replace the battery which should be quick for a non-mechanic as myself.
I spent more time building a make shift tool to detach/attach the battery than I did actual work. This due to them placing a bolt really bad so you can't access it with a normal wrench.
Not offering a paid upgrade to a 4G modem for the app features when they kill the 3G network in Sweden is also a bummer (they do in the US though, guess they are afraid of law suits).
I like the car in general, but they do some bad decisions that make me look at other brands when considering a new car.