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.
After my kyria went dark, I had to type on a KBD candybar at work. and a logitech keyboard at home. The candybar is annoying but the non mechanical logitech is killing my hands. So I say the adjustment is not as bad if its mechanical, I can survive. But not a non-mechanical one, my hand muscles are sore after half a day.
Edit: I used to just carry my Kyria with me wherever I work since its so portable, which probably contributed to its demise…