Fat Fritz 2 is distributed in the Steam Store [1], which is under US jurisdiction. Should not this be a good use for DMCA take down?
[1] https://store.steampowered.com/app/1587750/Fat_Fritz_20_SE/
[1] https://store.steampowered.com/app/1587750/Fat_Fritz_20_SE/
Ah yes, the $80 Stockfish engine.
Microsoft lets any program use that UI: https://docs.microsoft.com/en-us/windows/win32/windowsribbon...
I've only seen a few programs take up the offer though. Probably because the style is almost synonymous with MS Office as you've noted
So a good program should look and feel similar to other programs