Tommy
As always: Top!
While I started to use touch screens a couple of years ago, I reverted back to non touchscreen setups. I do mostly foam and wood stuff. Although I have a pretty efficient dust extraction system, there is sill a lot of dust landing on the touchs. Wipe them them off while chipmaking, and I guess you see the troubles. I use industrial grade Keyboards now
I have a yoga 370, some yoga 260, the mentioned T440p (should be as good as the X240). I'll test them and post results, placing the link to my findings in a later edit here for reference.
Greez
Chris