The trackpoint is kinda crappy on newer ThinkPads. I'm not sure what they've changed, but movement is always jittery under Linux for me.
My X230 is buttery smooth. The X1 Extreme and T490 I've tried, not so much.
That's been my experience with my new t480. I wonder if there's some other drivers that could make it smoother?
honest question, how to love the trackpoint? I constantly overshoot or undershoot my target when applying pressure to the stick. Any suggestions? Should I adjust some settings? Do I need to just dedicate to using it for a couple of weeks?