One of the leading indicators of not being able to do the "hard" thing anymore is that Apple gave up on building an EV after spending a decade and billions in R&D. Meanwhile, Huawei and Xiaomi were both able to produce good EVs. Xiaomi in particular is doing what Apple wanted to do which is to integrate and control their ecosystem from phone to car.
Xiaomi is literally trying to make everything from phones, cars, electronic tooth brushes, air fryers, soap dispensers, etc. It's astonishing.
I've had a few Xiaomi electronics including a dust mite vacuum and an air purifier. Both well designed and worked well for the price.