[extension]

Not only does it lack a standard library, it lacks a standard metaobject protocol. The fact that a MOP can be implemented in Lua is very nifty, but not having a standard one makes an ecosystem of shared code very difficult.

[anghyflawn]

I don't know whether this is in fact true for the Lua community, but surely this is not necessarily true in general. MOP is not part of CLOS as defined by the standard, but that doesn't seem to create horrible problems (especially with Closer)