I got myself Thinkpad X1 Extreme last year with 16 GB RAM, 256 GB NVME SSD, 8th gen i7 running Linux, so far I'm very satisfied. It can be upgraded fairly easily, I already installed additional 1 TB SSD, and will probably upgrade RAM down the road.
On Linux apart from switching between dedicated Nvidia GPU and integrated, everything worked out of the box for me.
On Linux apart from switching between dedicated Nvidia GPU and integrated, everything worked out of the box for me.