I think it all depends on their mindset on developing the platform and the mindset of new hires - are they being incentivized to "shake X industry" or brainstorm features every other day, or do they look at what they have and figure out how to make it even better. Is Twitter made to make it easy for users to do some thing, or is it being made to do what some other company did, but "for X"

I find most SV companies, like game design, falls apart when it is used as a vehicle to test out a philosophy instead of implementing an idea users actually want.