If you trained to write two independent trains of thought ambidextrously, would that double your mental speed or split you like in this Far Side Cartoon?

For reference:
https://cdn.imgchest.com/files/y2pck3e5k67.png

I would still be stuck with the one keyboard, so I wouldn’t be able spell a sentence. I’d be an innovative monster at phase shifting piano music though

Diego Irigoyen’s Youtube channel (@dieyendualpen) is about exactly this
https://www.youtube.com/watch?v=DzI9YIphu7k

in a rare non-ambidextrous handwriting post, he juggles while reciting powers of 2
https://www.youtube.com/watch?v=eyoX1Lse7SM

lock thread

A new challenger appears!
https://www.youtube.com/watch?v=iRBEmi-O0iM

there was some high school baseball pitcher a few years ago who could solve a Rubik’s cube while answering trivia questions, I don’t think it’s that Dodgers Rubik’s cube guy but I can’t find anything online.