I'm extremely happy with my Thinkpad X1 Carbon 4th gen. That's my second ThinkPad, absolutely perfect for development, great no-nonsense laptop, works flawlessly with Ubuntu. Highly recommend it.
I have used exclusively ThinkPads with Linux for about a decade, and tried switching to the XPS 13 for my last two computers. I think it's a shockingly well designed machine.... On paper. The bezel improvement is incredible, my battery life is insane, but there are just two many things broken with it for me to bother.
1) Both chargers failed after less than a year
2) Wi-Fi and suspend have been a consistent problem (even on the Developer edition that came with Linux! Did nobody at Dell try connecting to the internet or suspending? It's a fucking laptop!)
3) Their "premium support" was worse than useless (I ended up spelunking through dmesg and firmware files and fixing it myself)
4) constant coil whine
5) a TouchPad that loses its mind a few times a day....
I had all of these problems on BOTH machines. The design is so good that it's _almost_ worth it, but I'm pretty confident I will never buy a Dell product again. Back to the X1 carbon for me.
