> For instance Lenovo or Asus definitely care about pushing laptops' limits and design. A lot. IMHO more than Apple.

It's a bit more nuanced. Lenovo/Asus seem to be experimenting a lot more, but more like by throwing (relatively) easy-to-build variations at the wall to see what sticks, then release a few more polished SKUs. Apple doesn't really do that, but they do attack those limits and design aspects they care about very aggressively and with a ton of resources (e.g. battery life pre-M1, manufacturing tolerances).