The only thing mentioned were early start-up issues, not the entire blockchain seizing up like a suburban dad having a heart attack from shoveling too much snow off of his driveway.
And no, the PoS vs PoW isn't an opinion - its technical merits and drawbacks that aren't touched upon, because every post about Steemit is rah-rah go team - instead of taking a hard look at why it functions the way it does.
Steemit is going to have to do something radically different to change that 13% retention rate, that's for sure. But I doubt they have the will to refactor a system they're obviously emotionally invested in.
I think that Steemit will fade into the background as other projects emerge on its blockchain. The seizing up that I've seen has been on other blockchains.
Interesting - care to list any? Also, were they PoS based?
Inquiring minds want to know...