Is quick resume really that important now? games on the new consoles are loading in seconds.
Or is just to be able to pause a game at any point?
I think it's about pausing at any point.
Being able to duck out during a cutscene or other tense moments effectively gives the player full control over their game saves. No progress has to be lost.
Also, it helps bypass artificially long load screens. Apparently DMC5 SE still takes like 40 seconds to boot up while loading levels only takes about 3 seconds.
It also has some other small uses. If you actively wanted to test something between two games, it would be quite easy. Want to run a comparison between two Call of Duty games? Very easy to toggle between two games.
Edit: I think much of this generation is about quality of life enhancements.
Xbox especially with their unified platform approach and big effort with enhanced BC.
The integrated Playstation store, activities, quick resume, PIP shareplay, help videos, time remaining estimators, etc. all are going to go such a long way to lowering the barrier to a player enjoying their games.
Much of the QoL improvements are designed to keep consumers engaged. Curated challenges, activities, information, and quick loading all reduce the mental excuses players make to not play.
"Oh I only have ten minutes left in this level. I'll stick it out"
"Oh I do want to play but I'm not really in the mood to sit through the loading screens to get into the game"
"Oh look a new level dropped and I can jump right in. May as well give it a try"