Is this basically why things like Inbox, and the endless attempts at messaging, all come out as seperate products rather than enhancements to existing products, because that way you get to say you launched something new?
IMO yes: the promotion culture (technical complexity, impact) push people to come up with Big Ideas.
The thing with Big Ideas, is that they're often iterations of existing ideas, but just different enough that you can make a case for a fresh start. (And who doesn't want a greenfield project) Plus, the cost of experimentation is far less while you're not supporting a massive userbase.
To be perfectly honest I don’t know the answer to the chat app case in particular. That’s possible, and if one were to investigate and find each app was made by a team rolling up into a different director then I’d say that’s what happened. However it’s entirely possible that it was caused by an overly complex market segmentation strategy.
WhatsApp had the advantage of growing slowly and segmenting their users with time to experiment and tweak things. The Google chat apps came out at once, and it’s possible there were so many because they tried to come up with a working segmentation for all addressable users from day one instead of growing organically and grabbing each segment one at a time.
That's consistent with my own experience at Google. It's not that working on improving a thing isn't rewarded, but it's just much easier to demonstrate impact when you can use the word "launched" in your self-assessment Launching is in itself an accomplishment, while optimizing requires you to also collect data, do analysis on the data, and show a positive impact. "Impact" here is one of the buzzword categories that goes into an assessment of your performance as an employee.
