Probably since you can embed it in other languages quite trivially. For instance, in C after about a dozen lines of code you can now pass around data into Lua a

Probably since you can embed it in other languages quite trivially. For instance, in C after about a dozen lines of code you can now pass around data into Lua and back to C and thus give you access to a scripting language with little fuss. It’s also a fairly small and simple language, so adding it in won’t add much more to the overall footprint of the project.