Note this email and conclusion are from 2003-07-23:
> OOP to me means only messaging, local retention and protection and hiding of state-process, and extreme late-binding of all things. It can be done in Smalltalk and in LISP. There are possibly other systems in which this is possible, but I'm not aware of them.
The original article gives some important context to this sentence, as otherwise it is slightly weird, as both ST-80 (at least in comparison to earlier Smalltalks) and CLOS does not have that much explicit concept of messaging and in both cases it's essentially late bound function call.
