I think Lua is an amazing language and saddly the mentality to do everything in one language (Reminds me of people using MS Word for everything including spreadsheets is frustrating.

I really like the light weight small code base. That you can even do things functionally is a huge plus. If people would start using it as a scripting language for System Administration I think they would be pleasantly surprised but I guess BASH and Python/Ruby has stolen the mind share with Go seemly taking the place for a Lua in SysAdmin.