Except rlua goes out of its way to look like anything but the Lua C API. So you've immediately lost all productivity for people who know that abstraction well.

Except rlua goes out of its way to look like anything but the Lua C API. So you've immediately lost all productivity for people who know that abstraction well. Additionally, anyone whose spent any significant amount of time in that space knows of the amateur alternatives, and this looks no different.