I read that and found it to be not relevant to non-tech-savvy users. Well the problem is how do you really make them alter their keyboard so that control prefix is now a thumb key without sacrificing something else?

Like in the settings I pulled up in the other comment, I could ask them to make their Command or Option as Ctrl. But after doing that, they lose some other key (command or option) from the thumb key which is important too. Both command and option are important and frequent enough to be thumb keys. There is no clear winner about which key should go here.

> or modal key sequencers instead is key combos

Like which ones exactly? Can you name some names? Do you mean like Evil or god-mode? There's a lot of choices there and I know users who use one or the other. But many don't like to change the modeless editing to modal editing such packages invariable force upon you.

Much better is to just enable sticky keys which all major OS seem to be support. But again not everyone likes them. Who am I to tell them otherwise if they have tried both and prefer CapsLock as Control more than sticky keys?

***

Like I said earlier the real travesty is the wastage of real estate with the CapsLock key. The stock keyboards come with this travesty. I see anything that changes that as improvement even if it is making CapsLock to be Ctrl and using pinky sideways.

Making CapsLock as Ctrl is the least invasive choice for them. I'm not surprised that most people do this. I'm genuinely surprised that you would go as far as proclaiming this to be universally bad.

> Who do you need to state this obvious and well publicised fact that lateral/pinky motions are unergonomic?

Again, says who? I mean why is your word more important than those who swear by lateral pinky? Care to link to some research that establishes this as a "fact"?