To start, STEEM Is NOT a blogging platform. While it started out that way, things evolve and change.

This sounds a lot like the "Bitcoin may have started out one way, but now it needs to change" claim. Difference is STEEM itself was actually never a complete blogging platform. Steemit is a different animal from the network that enables it.

There was never a complete design that had to be set in its way and no expectation that things would stay the same forever. With Bitcoin this was instead explicitly a requirement. Not that none of the code would change of course, but that the fundamental design would stay the same for stability reasons and to remain sound money.

STEEM can adapt and evolve much more fluidly. As long as the network remains, it can support any number of apps or new concepts using its inflation based crowd funding mechanism or "potluck".