These are two acknowledged issues on Ubuntu (which is supposed to be fully supported):

1. sleep draining batteries: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1808957

2. keyboard lights turning on even when disabled: https://ubuntu-mate.community/t/keyboard-light-keeps-turning...

The second is just annoying; the first is serious (for a laptop).

I've run debian on a non-dev xps 13 for years trouble-free.

My biggest gripe is docking station compatibility with the Dell TB16 which, to be fair, is largely own fault. Suspending the laptop while connected to three ext displays and input devices, then spinning it back up before re-connection produces some gnarly results.

Arch linux on non-dev xps 13 here. Install went smoothly and it's been working very well for the past few years. Admittedly, the trackpad is not as awesome as Apple's, but it's adequate by my standards.