+2
Someday the main perpetrators will no longer be with us. But Lua will live on, no matter what the inheritors do, so long as it answers to a need, which it does. If you doubt that just look at cobol: "COBOL still accounts for more than 70 percent of the business transactions that take place in the world today."
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World domination is not an appropriate goal for a programming language. Where Lua ranks in this or that list of most "important" languages is totally irrelevant, IMHO. Lua offers stuff no other language ecosystem offers, for many use-cases. You use it because it solves your problem, not because it has a fancy lib ecosystem. Having such a system might help Lua become more mainstream, but who cares? That's not the point of Lua, IMHO.
Otoh, we have languages like Rexx. NetRexx was the first non-java language to target the jvm, but today nobody has even heard of it, mostly. It's a shame, because it's a gorgeous language. Like Lua. Why is it moribund while Lua is vigorous? I think it's about more than the language. Lua's easy integration with c etc. is the real killer app.