Using the term "Beta" to describe a 5-year-old product more or less deprecates the meaning of the word, doesn't it?
Semantics. At his point its a term of endearment more then anything. Google has more important things to worry about it seems.
Why do you think time has anything to do with the stability of software? It's really up to them to label their software how they see fit. I respect them for not blinding doing what everyone else does.