It is the Schelling point.

Nothing beats that, it's a greater advantage than all the nice functionalities of the others. I write my posts on busy, I look appreciatively at the steempeak functionalities, I use eSteem and partiko on my mobile, I've tried steeve.app as well.

But nothing compares to Steemit.com. It might be just a habit, or there might be something else. Theoreticising doesn't necessarily do much here, but to me (and I'm sure to most non technical people like artists, photographers, most bloggers) there's almost only steemit.com

To outside people too, there's only steemit.com. If you discard that, people won't simply move to the other UIs, they'll simply lose interest and forget about the steem ecosystem wholesale.