Simply, I just think the HHKB checks most of the enthusiast keyboard boxes. Compact, exotic layout (which makes sense once you use it), exotic switches, quality construction, easy to mod, great key caps (option for blanks), looks great with artisans, great sound, detachable cable, two great color options, just uncommon enough to be exotic, great history. Prolly missing some things. But few other keyboards are able to check all the boxes the HHKB does. Some vintage keyboards might check as many or more boxes, but none are as easily accessible as the HHKB. It might not be for everybody, but it's the reason so many people here love it.