Also still using a X220 (X230 motherboard swapped) with Debian and a T430s (with 1080p swap) with Windows.

Agreed that the X220 form and function is excellent. The 7-row keyboard is amazing. The IPS screen is serviceable. The swappable 9-cell batteries give around 10 hours of battery life each. The i7-3520M is noticeably faster than the i5-8250U in my surface pro 6, even though benchmarks suggest it shouldn't be.

Just tried a new T14. The keyboard is decent. I haven't found any laptops with a keyboard as good as the 7-row.