The issue linked in the sibling comment is the main one, but for a specific example of them having reservations about a feature in a more recent version, there's this:
https://github.com/LuaJIT/LuaJIT/issues/1013#issuecomment-16...
https://github.com/LuaJIT/LuaJIT/issues/1013#issuecomment-16...
Seeing a project and a community functioning like this is simply inspiring.