Devs and resources is largely addressed with SPS. Exchanges is somewhat harder, but many exchanges will support a chain that has a real user base.

The bigger problem is that Steem/it has been circling the drain for a while. If you reject the Tron migration, what do you really have, and what reason do exchanges really have to support it?

Not impossible, but I think people forget all the challenges that were already there, if not new ones.