What do you make of the Democrats choosing to move the debate to June?

It seemed likely then, and its obvious now, that the reason the Democrats broke decades of norms to have the debate in June (before the candidates were even nominated) was because either (A) they knew Biden would fail and they set him up or (B) they though Biden might fail, and party leaders gave Biden a chance to prove himself, and if he failed they'd still have enough time to go with plan B.

Biden obviously did not prove himself. But the weird part was that the Democrats had no workable plan once the trap they themselves set for Biden went off?

It was arguably one of the most machiavellian schemes a political party has ever had in US politics, to basically bait their own sitting president into self-exiling out of embarrassment, but simultaneously, the plan doesn't seem to have been thought through at all after the initial step?

Like they never game planned for what would happen if Biden didn't immediately drop out? Or if he endorsed Kamala?

Immediately after the debate, I assumed their was some Democratic hero waiting in the wings to step in (Michelle Obama, Oprah, Mark Cuban) - but instead it was like 6 weeks of bickering, contrasting statements, before finally going with perhaps the only person who polled worse than Biden?