It took a few months, not years, for me.

I don‘t mind it. 99% of my time spent typing happens at my own desk(s) and the few times I use someone else’s keyboard don‘t justify compromising on comfort with my own setup.

A big part of what makes it hard for me to use a normal keyboard now, isn‘t so much the physical shape, but the programmability and additional modifier keys offered by the UHK, both of which I use a lot.