Hello pF!
"definitely not supported.. Windows 11".  Are you looking for disaster?
:D
Not too concerned about it - all of my data is elsewhere.
If it does turn out I run into a showstopper issue with
Windows 11, I have a Linux Mint ISO waiting in the wings
for it. I'll be just fine.  :)
Are you hoping for an operational Win11 so that you can "learn"  
it?   I've toyed with the idea of a separate Win11 machine so  
that I could get familiar with its behaviour and features  
incase someone needs help with the OS.
I have a T540[win7] next to me, but most of the time I use VNC  
from the T60[xp] to operate it.  :D
I've recently acquired and installed a fresh (probably not new)  
keyboard for my T60[xp]. I was able to maintain the original  
keyboard relatively clean from the DNA and other crap that  
accumulates under the key caps over time, but lately, my C key  
was not cooperating most of the time. I got tired of pounding  
the C key multiple times until it registered. Plus, many of the  
key lettering was mostly faded away resulting in highly shiny  
reflective surfaces. The fresh keyboard is entirely matted  
black. The Thinkpad designed keyboard is so nice to use!  But..  
I digress.
--- OpenXP 5.0.58
 * Origin: (} Pointy McPointFace (21:4/106.21)