No trouble at all finding folding knives.
I mainly carry multi-blade Traditionals and ("and" not "or") a Buck 110 or 112.
Very few traditionals have holy/ventelated blades, thumb studs, and clips.
Those that do, I ain't got. Someone else can have my share of them.

Most have nail nicks ... the Rough Riders usually have fancy "match strike" nail nicks as standard equipment.
I'm not in a hurry to open a knife. I don't need one hand opening --- yet.
Maybe when the arthritis in my hands gets so bad that I can't open a knife I'll get an flipper, assisted opening, or auto. (is an auto considered "assisted opening"?) Or a "one armed" Barlow or such ... or just start carrying a fixed blade/"hunting knife"/sheath knife exclusively.