My main issue with 60% are the lack of arrow keys.
I haven't used F-keys for years (I do use the media keys on the F-row every once in a while) but my muscle memory needs dedicated arrow keys.
On my 60% keyboard I have set caps lock as a fn key where holding that down and any of the WASD keys gives me arrow keys.
I use my pinky to hold down the caps lock key and the others to navigate the arrow keys and I can do all of it with my left hand.
Similarly I have media keys mapped on the same function layer.
Would be nice to have an easy interface experience to set the F keys as radio buttons or dockbar icons, one of the F keys will allow ambidextrous arrow keys, on the left-hand "wasd" and on the right-hand "hjkl". I want to blend emacs/vi muscle memory.
Similarly I have media keys mapped on the same function layer.