Thank you for the vendor names! I’ll check out if they offer anything with stylus.

Re: support, what I mean is driver support.

I agree on your general point, but it also means that they produce OEM drivers that only work with a specific OS version. If you update, then you’re on your own regarding those drivers. This is the case for instance for some touchpad/trackpoint or battery custom drivers available for Ubuntu 20.04 on an X1 Carbon, but not later Ubuntu versions.

lack of global hotkeys in Wayland, graphics tablet support issues, OBS not supporting embedded browser windows, Japanese and other foreign as well as onscreen keyboard support issues that are somehow worse than on X11, no support for overscanning monitors or multiple mouse cursors, no multi-monitor fullscreen option, regressions with accessibility, inability of applications to set their (previously saved) window position, no real automation alternative for xdotool, lacking BSD support and worse input latency with gaming.

All things that don’t matter to modern users.