I think someone should run a BASH contest for the skinniest functional pen. Best functional; best aesthetics, etc. I think they could be made much thinner than they are now. AND I do have people ask me for a thinner pen when holding a slimline. So, there is a market out there, small but here none-the-less.
(No, I am not volunteering for doing that. Someone asked for ideas about 10 years ago and I gave one. I didn't know they were asking for volunteers to do a bash.)