Once I finally got it installed, Win 11 IoT Enterprise LTSC has been fine. The only real hitch was that I had a terrible time getting the graphics card drivers instsalled; kept getting a BSOD. But everything is running quite nicely.
As soon as I remember to get my other hard drives installed, it will be time to put the Adobe Creative Suite and Corel Painter X on it, and see how happy it is with those.