Back when the Internet became aware of typing injuries (RSI), folk wisdom was that one of the causes was the multiple simultaneous key presses, because of how people often contorted their hands to do it.

I made various changes, and now, decades later, I can type all day and night, without discomfort (much to the chagrin of HN).

(Kudos to people who limit yourself to one modifier at a time, and who use the alternate hand for it. It's still more repetitive motion, but at least you're not going against the folk wisdom about contorting hands.)