I don't think this is the end of Steem. Developers may have resigned from Steemit but I believe they still want to contribute to this blockchain and I am hopeful that some other entity would pay for their work soon if Steemit shuts down.

Witnesses, Tron and Justin had a meeting last night and Justin said he does not want to govern the Steem blockchain, he is just a businessman who wants to make profit. He would like to cash out Steemit's ("his") stake and leave, so I see the worst case is only STEEM price drop when Justin starts selling too much STEEM to exchanges...but then again, I don't really trust Justin's words because he has lied so many times since he acquired Steemit