PUC Lua uses a closed development model. They have a small team, and that team both decides what goes into the language, and writes the implementation themselves.
There are a great many implementations of Lua at this point, I'm aware of at least six. But Roblox upstreaming their semantic changes was never an option.
There are a great many implementations of Lua at this point, I'm aware of at least six. But Roblox upstreaming their semantic changes was never an option.