Maxperson
Morkus from Orkus
Not so much.
The most straightforward reading of the rules is that disintegrate does a bunch of damage, and if after the damage is done the target doesn't have any hit points left, it turns to dust. The way wild shape works, you go through the hit points of the beast form, revert, then start going through the hit points of the humanoid form. So, if you get through the hit points of the humanoid form, the druid turns to dust.
It's really not complicated.
Yep, it's absolutely that simple if you completely ignore the wild shape rules.
He has no hit points left UNTIL he reverts. Before then, he's out of hit points and at 0. You can continue to ignore the rules to make things simpler if you want. Ignoring combat rules works really well for simplifying the game.Now, the problem in this thread is that some folks want to get hung up on semantics instead of just taking the plain, simple meaning of the text. Y'all get excited over the phrase "reduced to zero," without regard for the fact that what that means is "don't have any hit points left." A druid that takes enough damage to wipe out his beast form hitpoints still has his druid hit points, so unless he takes enough damage to wipe those out, too, he's got hit points left.
When damage forces a druid to revert back from wild shape, it doesn't render the druid unconscious, even momentarily. It doesn't trigger any of the things that normally happen when a character falls to zero hit points - there are no death daves, the druid doesn't automatically lose concentration, etc. Druids losing all the hit points of their beast form is clearly and obviously not the same as a character falling to zero hit points, and it is absolutely ridiculous to pretend that it is. The only reason Jeremy Crawford didn't use words like "obviously" and "of course" in his response is that he's representing WotC, but I'm pretty sure he was thinking them.
The rules explicitly call out unconsciousness as the exception. There are no other exceptions without a house rule. Just because the rules except one thing, does not mean that all things dealing with 0 hit points are also exceptions. Your logic is faulty.