I think this is still accurate, haven't taken recent updates
https://github.com/draycs/zmk-config-Corne-ish-Zen/blob/main/config/corne-ish_zen.keymap
The bluetooth profile switching is nice. I can swap from work laptop to personal laptop with a keypress.
I've been using a Corne-ish Zen at work for a couple years now. It's a split 3x6 grid (columnar staggered) with three thumb keys on each half.
Numbers are home row with a left thumb modifier, symbols are home row with a right thumb modifier. F-keys the row above with the same modifiers. Navigations is yet another modifier (holding down semicolon actually), with IJKL for arrows, H for home, N for end.
Everything is either zero or one keys away and zero or one layers away.
I have a Kyria too, as another poster mentioned. But I wanted to try low profile choc switches and prefer them for work. BLE is pretty nice too.
The small rats point towards the rat king
Unless your snake is an ouroboros, I don't think folks will count the head and tail as consecutive