>>96787727
DnD was definitely about managing your resources, pre-5E. In the 90's or 00's if someone wanted to set a camp for 8 hours after every skirmish to make sure they had all their spells available, we would would have thought they were nuts.
It also goes without saying people had more attention span back in the day. So you'd see 5+ hour sessions and multi-level dungeons people can't even imagine today. The summer after graduating HS we'd play weekly for 8+ hours.
This is why the OG DnD had random encounter tables. Totally unnecessary for a modern group meeting for 3 hours but if you were trying to kill as much time as possible on a boring Midwestern winter day in the 80's, you needed filler. (it's not a coincidence DnD came out of Wisconsin and not California)