Linux compatibility is very good with current kernels (I had a few DRM/GuC restarts with 5.18, those seem to be fixed in 5.19), all hardware works out of the box. ADL-P power management is still being worked on afaik, so for the time being it seems like the power profile you set does have a larger than usual impact - powersave results in 20-30h runtime, balanced more like 10. The base models have a 1240P, which is an "4C8T + 8C8T" CPU (for a total of sixteen threads).
The CNVi Intel wifi in these doesn't seem to have the 5G bug.
Edit: One issue with virtually any better-ish new laptop will be that the display won't be native sRGB. The LG Gram series uses P3 displays, for example (most will be similar), which means that colors will be over-saturated and especially reds will be very intense and orange-y. MacOS has the correct color management to deal with this, Windows and Linux don't really, and Wayland in particular has very poor support for color management. I've manually set a generic P3 profile in Firefox and that pulls most colors back into a more agreeable shape.