There even used to be inline devices that filtered the L1-A /STOP signal. Because if you hit that key on a Sun server console, it paused the whole server.
As I recall we have IBM to thank for the Ctrl/capslock swap. The IBM PC keyboard featured that change and was a carry over from the selectric typewriter and possibly other IBM terminal keyboards. It was very annoying for those of us with muscle memory with Ctrl where it was supposed to be. Particularly for programs like Wordstar that had heavily used keys clustered within easy reach of the pinky finger resting on control in the "right" place.
In fact there appear to be programs and macros that still allow Wordstar mode in emacs (deprecated), vim and word. So I guess it's still popular. Supposedly George RR Martin still writes in Wordstar, preferring it to modern word processors.
In fact in a similar vein of using what you know I'm a little surprised there hasn't been a Kickstarter to reproduce the space cadet keyboard or similar just for the emacs fans out there.
[1] https://www.ebay.com/sch/i.html?_nkw=type+6+usb+sun&_trksid=...
It has a soft yet firm keypress feel, one which I have never felt in any other keyboard before. And most importantly, it has Control in the right place, as a proper Unix keyboard would.
I didn't find any on ebay, but I did find a whole Sun Voyager system https://www.ebay.com/itm/WORKING-Rare-SUN-Voyager-SPARCstati... $700 just to get a keyboard is kinda pricy.
Like the author of the article, I like the Happy Hacker keyboard. It's compact, well built, the control key is in the correct place, has well placed arrow keys, and isn't overly expensive. I have (I hope) a lifetime supply of them. So long as I can get ps2 adaptors for whatever comes after USB.
The type 6s are soft without feeling like you're typing on a marshmallow. Would love another if I could actually keep one alive.