What’s written on Wikipedia is no different from what’s written on a wall in some city’s street. No one knows who wrote it, no one knows how much of it is true. What’s written is determined by insistence, not by agreement or expertise. Whether you can get something useful from its pages is a matter of luck.

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.

The problem I’m discovering now with Linux & Lenovo/Thinkpads is that Lenovo officially only supports one particular LTS version for any given laptop model. For instance, an X1 Carbon gen 9 officially supports only Ubuntu 20.04. If your laptop – hopefully – lasts longer than the long-term-support duration, then you have to choose between (1) staying with an OS version that’s becoming more and more outdated, or (2) possibly be on your own if hardware/firmware problems appear in the more recent OS version.

Personally when my Thinkpad (Kubuntu) stops working properly I’ll go with a vendor that fully supports Linux, including updates.