I would like to know which original Operating Systems that run on retrocomputers are still being actively maintained and updated. This only applies to retrocomputer OS's that may still be used on original hardware.
- Assuming the OS vendor has long-since dropped support, the updates would have to come from some community project which continues to develop the OS by adding modular enhancements, or by reverse-engineering the OS and releasing an enhanced version.
- Modern replacements for the original OS that are in no way compatible should not be included.
- Updates should be able to run on the original retrocomputer hardware without need for modern hardware or emulators.
- Updated ROMs are Ok, since this may be the pathway to update the OS.