Thanks for this, Morrus! --
it's really helpful to have everything collected here.
It's interesting to have clarifications in the world of Twitter; responses are gut reactions typically, and while authoritative are not exactly official (in that it would be easy to see a ruling being changed in an official publication.
Still, for the most part they show a consistent attitude towards loose, free, fun play.
Only one of the answers seems really wonky to me (and is perhaps characterized by haste in responding?):
I've never been in a D&D combat that lasted more than an hour; nor have I heard of one -- most last fewer than 30 seconds. I really feel that the intention must have been for any combat to interrupt the rest.