Tuxedo is great. Beautiful devices. I’ve been asked about this ramdomly 2-3 times by people along the lines of “wow, that’s a nice laptop, where did you get that?”. Component upgrades also at decent prices.
Linux compatibility though… Good, if you use one of their preinstalled/supported options, but can be a pain otherwise. I installed debian and still haven’t figured out all problems with sleep/hibernation mode. The tool they offer is some bloaty node js crap that doesn’t work well.
Other than that, I think if you buy any laptop that is maybe 2 years old you should be good. Best way to check is maybe to Google the model + Linux and see how others experienced it.