It's FOSS - https://itsfoss.com/switch-xorg-wayland/
Brief: This quick tutorial shows you how to go back to Xorg from Wayland in Ubuntu 17.10 and vice versa.
One of the main new features in Ubuntu 17.10 is the addition of Wayland as the default display server. As more and more Linux distributions are moving away from the legacy X.Org server and Wayland seems to be the top alternative.
While Wayland maybe the future, it really is in future. At least for Ubuntu 17.10. The issue here is that a number of Linux desktop applications still depend on X.Org. They don’t support Wayland very well.