In this case, the question is whether to use Swift for a backend server on a Linux machine, or something else. That's the environment. I'd prefer Lua, simply

In this case, the question is whether to use Swift for a backend server on a Linux machine, or something else. That's the environment. I'd prefer Lua, simply because its a very proven language for that application. Sure, Swift has sexy features that make it appealing to developers. But the ecosystem for server infrastructure on Lua is formidable.