Comment by snvzz

I use mechanical keyboards. I also use vim. I'm familiar with the concepts you're on about.

I used the hp50g throughout university. I'm well acquainted with it and with typing faster and navigating menus faster than the screen can update.

Regardless, there's literal centimeters of distance between keyboard and CPU. There's no excuse for the calculator UI to lag noticeably relative to the keypresses.

I got the ti-89 out of sheer curiosity, mostly because it's 68k based. After using it just a little, it was obvious to me I wouldn't be suffering the 50g much anymore.