There is no Go2. Go2 is not a "thing", it's the absence of another thing. It's very Zen. Go2 is everything that Go1 cannot be. If Go1 was the universe, Go2 would be everything outside of it - which is nothing. Anytime someone mentions "This needs to wait for Go2", what they mean is "We can't do this now due to the Go1 compatibility promise, so let's leave it for the far future, for a day that may never even come, and table this discussion".