Having been a user of the old X lines throughout the years the current X/T and X1 lines seem like a definite improvement to me. And I also use the trackpoint exclusively.
It's mainly due to two factors: 1) thanks to having a very small touchpad, the keyboard is closer to the edge and I feel much less strain on the lower part of the arm, near my wrists, which becomes more apparent after long coding sessions; and 2) the key travel is much longer and typing feels "better" (I make far less mistakes).
Also, because the x395 is almost half the thickness, they could not fit a bigger battery (which is definitely my main complaint on these newer machines).
Don't get me wrong, the "X" series is great and I will probably get the latest version when I need a replacement *but* I'm sad they make these sacrifices in the name of "design".
Feels quite well built despite the low weight, too. It doesn't sacrifice on solidness to achieve its weight.
Plus the extra battery life in the Carbon. But the X1 Nano beats my 2020 intel macbook air in battery life from the benchmarks I've seen, which could be longer I have not found lacking