I looked at lua a few months ago, and this is what I found:
in reply to Re^2: Ruby Before Perl? Nah.
in thread Ruby Before Perl? Nah.
- It's a neat, small language
- Variables are global by default (like in perl), but no use strict
- The "A hash and an array are the same thing" concept really needs some time to adapt
- Simple things aren't always easy, hard things not always possible
Especially the second and the last point of that list convinced me not to adapt it as a general purpose programming language.
However for the area it was designed for (being embedded in other applications) it sure is very cool and useful.