After the painful experience I've had with the last ThinkPad I purchased (and before that, a Dell XPS, if Linux reaches a point where widely used distros are able to run on Mac M* flawlessly...personally I'm not gonna think it twice.
My last two ThinkPads have various annoying issues: battery drain when sleeping, trackpoint freezing after a while, fan kicking in for no reasons.
I have used a System76 laptop in the past, everything is working as it should, but the hardware quality is not comparable to Thinkpads.
With the exception of the trackpoint freezing I've had exactly those issues. I even had to send the laptop to the repair service because the battery thing was unbearable.
I was tempted to get a System76 but went for a ThinkPad mostly due to fear of the unknown. Lesson learned, I guess.