I've used Lua professionally and for hobby projects, and it's near the bottom of my list for languages I'd reach for in any context.

There's a significant mental lift for me to be productive in Lua, there are tons of weird gotchas, and I find it to be super verbose. Even basic stuff like parsing JSON I end up having to go rummage around for support for.

These days, I'll use javascript or python for my smaller needs, and I'd much rather have a JS runtime embedded than a Lua one for any game scripting I'm doing.