I’ve got a X270 and it’s a great little machine.

Same. X380 here. Cost ~$200 refurb a yearish ago. Love it so much I steered my mom onto one a couple months back, and she's been loving it too. Manjaro on mine and Win10 on hers, both great little performers. They fall short on tasks you expect to need some grunt for, but are great for everything else. I recommend it for anyone who will listen.

Having said that, I really am eyeballing the framework to be in the running the next time I'm in the market. Whenever I reach that point I'll need to do some comparisons. I could theoretically be convinced to spend a bit more to enable ongoing piecemeal upgrades, desktop-style.