While Apple has certainly made their share of mistakes in designing laptops (like designing a laptop that will crash because it doesn't starts it's fans when the graphics card get hot, or the butterfly keyboard) general quality is how they trap you. People normal say that Apple lock you into their ecosystem, but that's not the main reason I generally choose Apple product. My reasoning is: That the hell else do you su…
I grew up on old-school 90s Linux, where part of the fun was deciding which program you wanted to compile from source to accomplish a given task. So I may be biased... but I gave my girlfriend, a long time Apple user, an old laptop off of which I'd scraped Windows and put kubuntu on instead. She loves it.
Oh, and as for build quality, ThinkPad > Mac. Recent x86 Macs are glued-together pieces of shit that are optimized for being thin and light at the cost of all other concerns. They do not have adequate cooling, and when heat accumulates it has a tendency to break down the glue holding the system together.
I haven't evaluated the X1 Carbon, but my T450s is still screwed together. It's plenty thicc, but actually quite light in comparison to its size. It can also take a beating.