Wayback is an experimental X compatibility layer which allows for running full X desktop environments using Wayland components. It is essentially a stub compositor which provides just enough Wayland capabilities to host a rootful Xwayland server.
It is intended to eventually replace the classic X.org server in Alpine, thus reducing maintenance burden of X applications in Alpine, but a lot of work needs to be done first.
Wayback is an experimental state: expect breaking changes, and lots of bugs. Please submit pull requests fixing bugs instead of bug reports if you are able.