[Sakos]

Honestly, I'm more interested in keyboards that use vowels or other combinations to write over something like this. It's interesting, but I never need to write anything anyway. But the ability to type much faster would be helpful in certain situations.

[argiopetech]

If you haven't seen it one of the many dozen times it's been here, Plover - Open Steno Project https://www.openstenoproject.org/plover/, allows machine stenography (write a letter, syllable, word, or phrase with one chorded stroke) on your phone or computer.

It's definitely faster, but it's a steep learning curve.

For a slightly easier learning curve, I suggest ASETNIOP - https://asetniop.com/. The are/were keyboards built with a single row (maybe + thumb keys) that speak ASETNIOP, but I can't seem to find any at the moment.