I own both a 15" Macbook Pro 2017 model with touch bar and a Dell XPS 15" 2017 model. Both have their pluses and minuses. Both needed major repairs. Dell needed logic board and screen replaced. Mac needed logic board and keyboard. I mainly use the Mac. It's much quieter, has an amazingly vivid and bright retina display, extremely good battery life, best track pad in the industry and the best speakers on any laptop I'…
Dell XPS laptops are some of the best Linux laptops out there. No need for Windows. I've been using the same model as you with Linux for a while now and an very happy with it.
A few months after I got it the touch screen failed. Dell put some effort into repairing it (about an hour of remote support for updating the BIOS and afterward a technician visited me twice to replace the display (the first time he didn't have the correct replacement screen at hand)).
However, a while later the screen started to flicker sometimes. At first, I took it for a software issue and since I didn't use the laptop that often I didn't really care. When I realized that it was, in fact, a hardware defect (again), the warranty had expired.
So good Linux support is one (very valuable) thing, but if the build quality is that bad (I mean, even my 300€ first gen Eeepc still runs with fewer problems), I am not willing to pay the XPS premium again.