I think you're probably overestimating how much most people know or care to worry about setting custom do not disturb settings, although that's just my anecdota

I think you're probably overestimating how much most people know or care to worry about setting custom do not disturb settings, although that's just my anecdotal guess based on interactions with friends outside the tech space. Also, I'd consider myself pretty on top of tech (enough to run cyanogenmod/lineageos/grapheneos) and have a custom DnD schedule, but I had no idea setting it per contact was an option until you hinted that it might be. I've been wanting that for a while so thanks for letting me know, but also I'd imagine most people are very unaware of that option still.