Does it ended? On all distros I know of, Fedora, Arch, Debian, Ubuntu, Mint, Zorin, we can swap the desktop environments like gloves. The only exception being immutable things like Fedora Kionite, but they are made to be untouchable and for specific users.
Wayland does not change anything there, only that the desktops with less developers must take more time to adapt. What makes desktop interoperable are FreeDesktop standards, which are now in full swing to Wayland.