> I've switched to programmable ergo keyboards where there's a whole slew of options

The best part of these kinds of keyboards is they provide each thumb two keys each.

That allows for the keyboards to be much more expressive, as well as not needing the pinky for keys like backspace/enter/esc.

> not needing the pinky for keys like backspace/enter/esc.

Probably not so efficient in terms of WPM, but after my previous issues with RSI, I somehow ended up pressing those keys with my middle fingers instead of my pinkie. Usually multiple fingers hit the key simultaneously, either long finger + ring finger or long finger + index finger.

Requires more hand movement but certainly more comfortable.