1. Suggesting the edition wars are over merely because 4e's had to surrender takes a rather narrow view of the wars;
True. I was speaking only of the 3.5/4e split. That's what the 'edition war' is usually describing.
It's true that there are folks out there who hate 3.x and 4e equally, and as vehemently as the 3.5 warriors hated 4e, and, for them, the war is not over, they still have to destroy/suppress 3.x (good luck on that with the SRD out there, BTW).
The OP was specifically talking about the 4e side of the war though, how any criticism of 4e, specifically is labeled 'edition warring.' At this point, it's really not, it's more analogous to ongoing violence by occupying troops after a war has ended.
'Edition Cleansing,' perhaps?
[quoite]2. Saying 4e will never be supported again may be premature, in that 4e has something going for it no other edition really had: WotC has poured a pile of money into online support for it and it's hard to imagine them simply throwing all that away.[/quote] considering the loss of /one/ programmer shut down the development of the on-line tools for years, I think the amount of money they invested in it was pretty small.
5e will certainly have on-line support, too. It might be that the existing on-line tools are adapted to support both, if that's practical. Otherwise 5e will have to be developed independently, and all available resources will go to that. It's easy enough for WotC to leave the existing stuff up, but even that requires maintenance, and will have to end eventually.
Of course, practical or not, the goal of 'uniting' the player base around 5e won't be served by keeping an alternative to it available.
2a. There's also the possibility that Hasbro will sell off (or farm out) the D&D franchise, at which point anything can happen depending largely on who buys it and what they want to do with it.
It would be a radical reversal from their past behavior, but, yes, anything is possible.
3. No edition is dead as long as someone keeps playing it.
Yeah, an RPG's 'life' is not exactly like an actual life - dead is a matter of degree. The OGL lets 3.5 be supported indefinitely by 3pps, and has been adapted to do something similar for prior eds via retro-clones. 4e is unlikely to get treatment. The GSL is much more restrictive, and the nature of 4e design, which is very systematic and balanced, doesn't lend itself to the open-source development environment. You could retro-clone 4e and get something that 'feels' a bit like it, but it's unlikely to capture 4e's strengths, which were the result of design principles that even WotC found onerous after only two years. It's not something a few enthused amateurs are going to be able to replicate.