I think this is the wrong way to be looking at it. WINE is an open-source project that explicitly wants to run as much Windows software as accurately as possib

I think this is the wrong way to be looking at it. WINE is an open-source project that explicitly wants to run as much Windows software as accurately as possible on non-Windows systems. If something's broken, anyone can fix it. This isn't true for the proprietary software that is Windows and C&C, albeit C&C Remastered is partially source-available now, so that could improve matters somewhat.