There have always been many distinctly different graphical environments for Linux. Being incompatible doesn't serve this goal which is why you don't need someth

There have always been many distinctly different graphical environments for Linux. Being incompatible doesn't serve this goal which is why you don't need something like wine to run gnome apps because they are executing in the same environment as say KDE apps. This ceasing to be would have to be regarded as extraordinary and undesirable. It's hard enough to get people to support Linux.