> Though, I'm typing this on a swiping keyboard. It's different enough that a better layout might have been worth it here...

This seems to be an interesting place where the type bar optimization problem of the earliest typewriters came back in a new weirder form. For swiping keyboards to work the words need recognizably different shapes and for irregular pairs to be closer together (just as with the type bar problem) and so QWERTY is very strongly and weirdly optimized for swiping even though it seems very unlikely its inventors could have ever imagined swipe typing.

I can anecdotally admit that touch typing and swipe typing are extremely different muscle memory. I touch type Colemak and swipe type QWERTY. (One of the things that prompted the move to Colemak for touch typing was that I needed to unlearn a ton of bad muscle memory from self-taught/self-"optimized" QWERTY, as it was inflaming RSI/RSI-like symptoms, so the loss of "fluency" there was a requirement/feature for me.)

FITALY