I found a different solution to the "getting around the screen" problem: set your keyboard repeat rate to 100 keys/s.

Upside: works anywhere, much lighter mental load, relatively easy to learn and adjust to.

Downside: some programs (ironically, mainly Emacs) can't keep up, and scrolling becomes choppy.

On Linux this is quite easy. When I was using Windows, there was no good solution for USB keyboards, so I hacked up a driver to do it: https://github.com/CyberShadow/KeyboardEmperor (signing keys not included).