Voted for E medium feasibility medium impact.
I think that once a decent help system were setup IF groups of SM users came over, and were able to start out with other friends and followers it would be possible for it to work. Single early adopters have had difficulty bringing others with them in the past. The audience here isn't big enough and it feels like starting over from scratch. Going from 10 or 50 or 100 interactions a day down to maybe 1 that isn't spam quickly cools off any built up enthusiasm. Toss in the poor help system and it creates roadblocks. In the past, the long wait for entry was a problem, but now, quick access but with no power to leave comments or votes quickly kills off the enthusiasm. So it will be difficult to get people to move from their comfort zone to something new. You have to have soemthing that makes them want to come here - new opportunities they won't get in current areas they are active in, new markets, a privacy level they aren't getting elsewhere, things like that. Steem needs to present itself as the answer to the problems that are appearing in other platforms - address the privacy concerns of FB, address the differences in fair payouts that's lacking on YouTube, problems like that.