I guess it's because unicomp does almost no marketing or at least doesn't bother to get their stuff in retail stores where there tend to be racks of so-called gaming keyboards and other mechanical keyboards?
I can always know whether I pressed the key or not using a buckling spring keyboard, the same cannot be said for linear keys in my admittedly limited experience with razer yellow switches.
*Yes there is no doubt someone somewhere who has a space cadet kb or actual physical teletype still hooked up to a modern PC somewhere, but I'm talking about something that is actually available for sale on a mass scale by consumers. The model f revival exists for collectors and is functional, but is just bespoke enough to me that it's more of a collector's item than a mass product.