You can run Linux (eg Ubuntu) on pretty much any Thinkpad without problem. The XPS is too much about fashion to be great. Anyway, putting an Intel chip in a thin and light is a useless balancing act of fan/batterylife/heat/power. People are waiting for the x13s to be fully supported by Linux, which is close.
I hate Dell. They just doesn't care about Linux users. There was an issue with thermald service in Ubuntu 20.04 It was partially fixed by open-source comunity, but Dell still doesn't provide any changes for more than 1.5 year. Also it's almost imposible to connect 2 screen with dell dock station.