So, if I may be so rude and ask: Is there any realism in getting this fully supported at all in the foreseeable future? Including the NPU, proper power management, USB4, camera, etc, or is it more likely we will end up in a similar state to Asahi where we get the basics working but struggle with the more complex components?
I think Asahi is pretty complete nowadays compared to the X Elite machines (audio, camera, KVM is all working).
Feature support for the X Elite machines depends on it getting merged in upstream Linux. A lot of it is driven by volunteers and there is no guarantee whatsoever that it will ever be complete.
The previous generation Thinkpad X13s has better hardware support but I still wouldn’t call it complete as there’s still quite a lot of room for power management/stability improvements etc.
So I’d say it is currently a bit of a gamble. If you are worried about that, maybe consider going with the safe option instead.