James Gasik
We don't talk about Pun-Pun
Who reads the DMG?The DMG has optional rules for this exact thing. Epic Heroism, p267. Five minute short rest, one hour long rest. They suggest doing much harder encounters to compensate.
I kid, I kid. The problem with that is it doesn't actually shift the game to encounter-based from daily resource-based. Epic Heroism is still going to leave casters with spell slots to burn, and unlike, say, 4e, there are a lot more spells that are useful in solving non-combat situations. A 4e Wizard might have an extra Fountain of Flame at the end of a game day. No big deal.
A 5e Wizard would be like "hmm, what else can I do with this extra spell slot laying around?". And in a world with Fabricate, Simulacrum, Guards and Wards and who knows what else, you can turn that spell slot into a resource you'll have for the next game day.