XPCOM has support for stable, versioned APIs, but no one cared about using that subset since the rest was also available; it stagnated and the supposedly unstab

XPCOM has support for stable, versioned APIs, but no one cared about using that subset since the rest was also available; it stagnated and the supposedly unstable APIs ended up bearing the compatibility burden. Now there will only be a supported subset, and the trickier stuff will require getting a patch accepted instead of monkey-patching and letting the user cope with the breakage. Your coping skills are above average, I've submitted patches too, it's still yak shaving and not a very productive use of time. Working out APIs is a hard problem, it should be handled as part of the development phase instead of being completely disconnected.