1. Linux support was pretty bad. You needed a custom kernel for an enjoyable experience, and even that was pretty unusable on anything other than x11 GNOME.
2. The overheating was a dealbreaker. I presume this was either a driver issue or hardware failure, but the device would regularly hit 55c in normal workloads, which was a no-go for that sort of product.
It was so close to being the Linux iPad of my dreams, but fell just short. I might give one of the later models a shot someday, but I'm not really in a rush. Maybe once Alder Lake makes it's way into a decent Windows convertible, it will finally be The Year of the Linux Tablet.
It's actually a ton faster in Linux, but with a bit worse battery life.
The biggest flaw with using Linux on the earlier Surface line was the shit Marvell Wifi. That would drop out all the time. So glad they switched to Intel for the later ones.
Windows 11 on a tablet is really not that bad.
(I also run linux on a desktop and have an iPhone and Apple Watch, so not a hater by any stretch of the imagination)