I have pretty bad anxiety and ADHD. Flicking/flipping a knife open and closed calms me down.
I started carrying a modern folder when I was 17 for the cool, tactical factor, and typical teenage delusions of grandeur. That was 24 years ago, and my first modern one hand opener was a SOG Pentagon Elite liner lock.
Tactical type knives were really becoming popular, and I became a SOG fanboy for close to 20 years. Sure I owned a few Kershaws, CRKT, and a few others.
After my strokes in 2018, my anxiety, ADHD, and OCD got exponentially worse. Quick open knives help.
Yes I live in a suburb, though a rural part. Most of my use is cutting open boxes, tape, toys for the nephews, etc. Light duty tasks.
I've ditched most of my big heavy knives and prefer lightweight.
When I was younger, say up to about 8 years ago, I did a lot of camping and canoeing. 3 times or more every summer on canoe trips with about 20 people. We camp the night before at a place with no water, no electricity. Well, one part had electricity, but it was for the campground people.
We'd pitch our tents, etc, then get drunk, blast music, etc. Then in the morning it was an all day canoe trip. I carried a hatchet, a SOG Seal Pup, and a modern folder. Chopping wood, pounding in stakes, etc.
After those trips fizzled out, things went awry, and I've rarely used a fixed blade. Though I do want one of @horsewight fixed blades in Damascus, just because they are cool.
This is a world where convenience is everything. Drive thru restaurants and delivery, grocery delivery, etc. And a one hand opener is part of it.
Talk about SUV'S and crossovers. So much easier for my 6'3" frame to get into one. I don't think I could fold myself into the Camaro I once had. Certainly not frequently.