Wayland is also not X11.

Just curious, but is it really so hard for people here to think outside the box?

To me, it seems like the people thinking inside the box are those that claim that cross-platform necessarily implies it runs on Windows.

It's probably fair to say that an application with native Wayland and X11 support is multiplatform. I can understand somebody disputing that, but certainly Linux and MacOS are different platforms. They don't even share executable formats.

The heavy lifting is done by glfw though.