Smart move in not moving.
I guess the same general notion can be applied to users on steemit. At least with the internal market structure they can just play around with sbd and steem locally and not have to risk exposure to external exchanges, even though they might miss out on profit-taking, they'd also avoid the situation of getting their money completely trapped or stolen.
Yeah, some good SMTs might add some baseline value and demand for steem, but it might become an issue like other coins have where parallel economies don't elicit strong demand for the root one.