In an embedded system sometimes the "leave it alone" factor outweighs the new features. Anyway, you can find a summary of changes since 5.1 here: https://www.l

In an embedded system sometimes the "leave it alone" factor outweighs the new features. Anyway, you can find a summary of changes since 5.1 here: https://www.lua.org/versions.html https://www.lua.org/versions.html One of the biggest changes was the introduction of 64 bit integers in Lua 5.3 Perhaps my favorite little change is that you don't need to type = in the repl to print an expression anymore.