When is it too late for Biden to drop out?

[quesaisje]

Dropping out abruptly and allowing delegates to figure it out at the convention would be a bold play to disrupt the race.

It would be the ultimate show of faith in representative democracy, the healing balm to the gaping wound of January 6. Joe Biden could say, this is what democracy looks like, not the fake McGovern-Fraser version where people spend millions of dollars on television advertisements and social media inanities to compete in a parade of low turnout elections with widely varying rules. This could be the Gettysburg of Joe Biden's "Battle for the Soul of America," the triumph that they eventually look back on as the one that turned the tide, and the event that cements his place in presidential history.

N.B. I'm not saying that it would happen, just that it could happen if Democrats wanted it. It's "too late" in the sense that the party decided many months ago that an open contest is too risky. But everyone here dreams of watching something like this unfold, even if we don't actually want it to happen now.