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’ve bees using 34 keys WITH HRM (not Miryoku, something home brewed) and it’s been a great experience. I recommend wholeheartedly. Just keep in mind it’ll take some time to get the layout exactly how you want it. And you may just permanently be tweaking it lol