Thanks for sharing. One of the challenges (always has been probably) with our heavy "influencer" culture is we tend to gloss over that what works for me, might not work for you and vice versa.

I recently switched to a split columnar layout but not for solely for ergonomics sake - I do the same things as you but with my right hand handling b, g, t, and my left hand moving over to accommodate (with "incorrect" fingering for c, and variable fingering for the whole of the left side).

My choice to move to a split was primarily motivated by a need to reset my typing style and a hatred for where the escape key sits on a keyboard (not forgetting the waste of space that is the spacebar.)

It would be neat if someone would make a zmk / qmk keyboard with five thumb keys where the space bar is. Might be the sweet spot for most.