At this stage I have my doubts since MSTS doesn't work on "New" computers that was released with Windows 10 preinstalled and not an OLD system that was upgraded from Windows 7, 8 and 8.1 to Windows 10 "That's why some people has been successful running MSTS on Windows 10 because it's an OLD computer with older specifications"
And since OpenRails has not have any updates lately "I wonder if it's been neglected" there could be "Could be!" a chance OpenRails will probably not work on Windows 11 - If I was the developers I'd be looking at Unreal Engine for upgrading and future releases of OpenRails IT'S FREE to distribute if using a freeware licence agreement
If however, this new version of Windows will be able to run MSTS and OpenRails! Windows 11 will become our best friend. I just don't like our chances though!!