Since we can't see the source for MacOS or Windows we can't judge whether or not these are the same challenges that they also faced. Aside from the different di

Since we can't see the source for MacOS or Windows we can't judge whether or not these are the same challenges that they also faced. Aside from the different display server protocols the challenges may not be unique to Linux. Perhaps the money that went into supporting this feature allowed them to overcome these challenges with much more ease. Unless someone who is more familiar with the source of MacOS can clarify otherwise I think it would be safe to say that this is not a new challenge, perse. Just new to Linux.