If I may make a somewhat philosophical point here, as a non-alligned/non-affliated voter.
I was the first (and still, only) person in my family to go to university, and proceed to a non-traditional, white-collar career. Now, there are people from my background, who vote for all hues, and none, my leaning would be towards Labour, but my vote has floated around.
It just seems to me that with a rise in the general education of the population, together with the stunning impact of social media / internet, that it was inevitable that there would be at least a clamour, for a return to a party espousing traditional left-wing values, as relevant or not as they are to modern society.
As an ordinary voter, I at least welcome in principle any divergence from the grey consensus politics that has dominated since the rise of Thatcherism, and the corresponding shift to the middle-ground/centre-right, from Labour. There wasn't much difference to me, as a punter, between one-nation Toryism and the Blairite Labour Party.
I do think Corbyn is unelectable as it stands but his re-election does send a more important message as to the state of public discourse as it is currently. I recall Tony Benn saying many years ago that if voters had a simple choice between Tories implementing Tory policies and the Labour Party doing the same - they may as well vote Tory - better the devil you know and all that.
As it is now it will take an election defeat to remove Corbyn but the lesson is there for the Labour Party in the long-run - many people post the 2008 crash and outside of the usual (protest) voices want a clearly-espoused left-wing alternative to which they can identify with and get behind. The challenge for Labour is to become that alternative as a willing electorate surely exists - I still don't buy that the majority of people would not support progressive, egalitarian policies as opposed to the narrow and elitist offerings of the Tories. They do need the right face to project that though and Corbyn isn't it.