Some say that republicans break norms, and then democrats normalize what the republicans did. I'd say in some cases that's proven true (drone strikes).
No idea what the outcome will be in November, but I don't know if Biden can mount a good campaign.
I don't think anybody who looks at what happened can seriously attribute Biden's winning the nomination to the campaign he's been running so far.
He's running as the guy who will return things to normal, meaning the way they were during the Obama years, which means Republicans will be setting the terms of engagement for most of a Biden presidency. Biden will do a lot of caving, and won't get much in return.
By 2024 we'll be having think-pieces about how senate's refusal to seat any supreme court justices isn't really a crisis, and how many justices do we really need, anyway? After all, four was all you needed for quorum back in the beginning.