My support for Corbyn depends on how good the youth turnout was yesterday. If it was trash I see no reason to expect it to be any better in a general election, and if the only demographic that loves him doesn't turn up then what use is he?
Nothing of what I saw of him over the past few weeks gave me any confidence that he'd be any good in a general election. He'd be absolutely mauled by the Tories and the press, too busy proving that he's better than all that instead of actually drawing attention and votes.
Chuka Umunna was pretty great last night and over the past few days, I'd be interested in seeing him go for it. Still suspicious about why he dropped out in 2015 though.