These were blog posts I managed to fetch from the wayback machine on my old blog, some are missing content because they weren't all archived. They were all written back in 2015, so if they sound a bit young, they are.
Efficiently using lua in your game engine
Where I think valve went strong
These posts are msising images that wren't archived, their content may be lacking
Setting up your lua interface
Getting the most out of mlua meta tables
My experience with old code
Attempting to balance morbus
Managing objects and components in lua
When to call lua scripts from C++