While distance between keys (in this case ctrl and B) is one factor, it's not the only factor. The position of Caps Lock is just to the left of A, which is part of the home row on a QWERTY keyboard, while depending on hand position, control is much harder to get to. I know the curl required for my pinky to engage Control is less comfortable for me than the slight shift to engage Caps Lock.

If you're straining your hands to type a chord, then you're typing it incorrectly. Control, alt, and shift are on both sides of the keyboard for a reason. You should use both hands to type chords; one key with each hand.

I use Dvorak on my home computer and any computer I have a chance to use regularly (like my primary office PC). I've remapped capslock to control at home, but not at work.

Typically, the context shift requires no more than 5 minutes, and usually 0 minutes, for me to stop making mistakes. In my experience, the fact that I don't have the precise same physical keyboard helps a ton. My primary office desktop keyboard is different than in the labs (where I have less control), and different than my home laptop. So what I'm typing on feels different and I'm able to quickly adjust.

It takes some practice, I won't lie, but after a few weeks you'll probably not be making any major mistakes.

> I am hesitant to remap capslock because it will fuck me on any computer that isn't mine.

I understand the concern. This does trip me up from time to time, as do other UI preferences such as tracking speed and scroll direction. How much time do you spend (both frequency and duration) using others' computers? Regardless, I suggest you give it a try to see how often it actually does cause an issue, and whether or not it's manageable. Of course, YMMV. It's a trivial change to revert if it doesn't work for you. I know for me personally it's been a substantial overall win to remap caps lock.