I had an interesting experience the other day. I have been using split keyboards for years, but only recently began using a Kinesis Advantage 360 Pro as my daily driver for work; I am so use to the layout now, that in instances where I have to use a non-split, or even my older splits, my fingers fail me entirely - like my brain forgot how to type, my thumbs eagerly searching for the thumb cluster that isn’t there.
I am at the beginning of the same journey I think - a big part of why I never learned to touch type was how uncomfortable standard keyboards are. It always felt like trying to get my body to do something really stressful and unnatural, no matter how much I practiced, and I would get a lot of pain when typing.
I’m going whole hog on learning once my new board gets in - fully ergonomic split, column staggered, tenting, most likely Colemak DH, and we’ll see if we can make this ish work!