I'm using UHK for almost a year and can share with my experience. It really depends on a keyboard - if it is similar to regular one or not. The UHK is pretty s

I'm using UHK for almost a year and can share with my experience. It really depends on a keyboard - if it is similar to regular one or not. The UHK is pretty similar to regular keyboard - keys are staggered (not ortholinear), there are no additional thumb keys which are also not available on a regular laptop keyboard. After a year with UHK I'm still able to jump between laptop and UHK when needed. Somehow muscle memory "detects" when my hands are on UHK and I start using additional shortcuts which are not available on laptop. Meanwhile if you'd pick something like Dactyl https://github.com/adereth/dactyl-keyboard https://github.com/adereth/dactyl-keyboard, I believe it would be more difficult to jump arround. P.S. After a year my typing speed on split keyboard is higher compared to laptop.