The only reason Elena got The Cure is Bonnie....
... In case some of you were suffering from a convenient case of amnesia. Bonnie is the one who suffered however long in that crappy world, alone, and thought - out of the goodness of her heart - to bring back the cure for Elena. So that Elena could get a happy ending.
All these histrionics about Bonnie borrowing the cure for a few decades of happiness with Enzo are absurd. And once again this fandom showing its collective a$$ when it comes to Bonnie Bennett. Especially because according to the show's science, this plan was pretty fool proof - Bonenzo would have their dream life; they'd die - and obviously have a plan in place to make sure Damon got the blood; Elena would resurrect and Delena could run off to the hills to have a passel of unsightly children or whatever else. Elena's corpse would continue to be preserved like a pickle until Bonnie died just as Kai clearly explained it would. The cure has nothing to do with keeping Elena young and pretty while under the sleeping spell. There's no reason that someone else in their intimate circle can't use it while Bonnie's still alive and there's no chance of Elena waking up.
The Cade plan, on the other hand, was utterly stupid because who even knew if it would work on the devil - especially when there's absolutely no preceding show logic to support that a spell designed for vampires would suddenly work for all and sundry immortals. So essentially it's a goddamn waste of the cure. And would've led to not just Delena's futures being ruined but everyone else's as well because Cade would likely survive and tear the world up anyway. They're better off with Super!Bonnie now coming back to take on Cade than any of the useless plans Caroline and Damon were coming up with.
And in the end, Bonnie Bennett is going to save the day. Again. (I said that in Buffy Summers' voice). Hopefully she and Enzo get to live in some hell dimension together for the rest of eternity and she burns Mystic Falls, including Elena's body to the ground so the fandom can really whine about it ad nauseum. And I'm fond of Elena and Damon but this fandom's stupidity about this incident is making me despise the both of them.