They need to hit their growth numbers. Either they come up with something new ( which is really hard) or they keep expanding their current main product. The latter is much easier.

In my view a lot of products could be frozen once they are mature . MS Office could have stopped most development a decade or more ago, Gmail could have stopped years ago. Windows could have stopped UI changes with XP or 7. But what are all these people supposed to do if not tweaking their product?