By this "logic" it doesn't make sense to celebrate birthdays or wedding anniversaries either, as most babies, are more or less the same in the days and weeks before they are born. By the same token, many couples are engaged well before they are married, and begin to live a life very similar to what married life will be like for them. Humans LOVE to celebrate anniversaries (except for Jehovah's Witnesses, I've never really understood that), and we need SOME sort of reference point. version 1.0 or whatever whole integer people use seems to be that for software. Except Google, they don't care and will always keep things in beta.