There's a number of options for replacing the control board on the kinesis advantage (or advantage2) with one that runs QMK, providing the same sort of configurability as the ergodox, and the advantage 360 pro runs on ZMK.

I replaced the controller board in my Kinesis Advantage with a QMK-based KinT and I highly recommend it: https://github.com/kinx-project/kint

Do you type S with the left shift?

I think all the ergonomic keyboards assume you use the opposite hand for the shift key.

yeah all the *doxes suck.

I've been on advantages for 20+ years at this point and haven't had any of the RSI that prompted the switch since.

Currently daily on a 360pro. Might want to sell it or reswitch it for something a little lighter and maybe even something linear. Maybe a silent red or lf red.