I have had a few dell XPSs, newest one was a 2019 one and they work, but they were not even close to the quality of the full macbook package. The keyboard was dogshit, the webcam didn't work on linux, the mic picked up huge amounts of fan noise, finger print scanner didn't work on linux and the maintainers of the open source drivers believed the hardware to be critically insecure so there is no reason you'd want it supported anyway.

You could upgrade the ram on the 16" versions though which is nice. Although this is still not something I have ever done on a laptop. The new Macbooks now have easily replaceable batteries which is a welcome change.