I used to use one of the original IBM terminal keyboards from the 80s, those with the additional F-Key row.(F13-F24) I still have it even.
It was actually not really comfy though. Loved the clacking and look, but not much else. I only press keys lightly and typing for long stretches on that keyboard was exhausting. Great keycaps though, they weren't shiny when I got it and didn't even have a hint of shining when I stopped using it, after heavy use 2-3 years later.
Switched a lot over the years and now settled on a 60% keychron (metal frame one, but plastic casing) with custom qmk firmware. Love the industrial/professional look and compact form factor which goes really well with my tiny PC. Bought some nice thick PBT Xerox/electric typewriter keycaps from aliexpress for it and the switches are Kailh Box Whites (v2) with speed copper ones (higher actuation point) on the modifiers and a heavier spring box navy one on the space bar, so I only have to ever-so-slightly touch the modifiers but get a nice CLACK on space. Helps against emacs pinky.
I honestly like the sharp, clean double-click of kailh clickys more than buckling springs, which are muddier and hard to get non-pingy.
The keycaps sadly, and as much as I love their retro looks, are already having a slight shine on some keys if you look close enough after not even a year. Aliexpress just cannot compare to 80s IBM I guess.
I'm very curious about the HHKB, but a bit put off by the price.