I have no idea what you're alluding to. Not only are many people on LuaJIT's api version anyway, I don't remember ever running into any meaningful stdlib change

I have no idea what you're alluding to. Not only are many people on LuaJIT's api version anyway, I don't remember ever running into any meaningful stdlib change that wasn't easily fixed. And Lua not having OO isn't really a problem to most people either.