I have a T470 -- at the time the most recent T-series 14" Thinkpad. Everything pretty much worked fine? But that's just one data point. Perhaps if they're super new, you'll run into more issues. dom0 is hyperconservative with updates, so maybe you'll need to run testing-grade stuff to get all your hardware to work properly.

I think I had an issue with WiFi + suspend/resume but that was easy to fix, and fixed by default now. (It involves reloading the driver after resume -- that's automatic now but the setting lives in a config file.)