Yes, Lua is quite easy to embed and is popular in game development for that reason. It appears in a few other applications like Redis as well. But, in the big picture, it's a weird language that is not very popular. People want Python and/or Javascript, and JS is awful, so that leaves Python ;).

I do bot understand the downvotes. Maybe because of wording “weird”. Give me a break, I think it has a point: much more people can do Python as Lua.

I do like Lua, but if I just try to use it in my work, I would be paria.

I had figured people didn't like the dig at JS. Unfortunately the WAT video is no longer on youtube. It might be on destroyallsoftware.com.