I have come across projects called X12, Y and Z, but I don't think any amounted to anything. 20+ years ago, I joined a group of open source devs wanting to bui

I have come across projects called X12, Y and Z, but I don't think any amounted to anything. 20+ years ago, I joined a group of open source devs wanting to build a successor to X11, and I suggested "Umlaut" as a working name because of Germanic languages' alphabets typically had letters with umlauts after 'Z'... However, we wanted different things, so we disbanded. I wanted to push network transparency with object capability-based security and SVG-like vector graphics. Others wanted something more similar to what Wayland is today, or even simpler: with 32-bit framebuffers like what SerenityOS has. Today I think perhaps a capability-based windowing systems would best be built on top of a capability-based OS — building it on top of Unix/Linux would be a kludge at best.