For 30 or so years Linux, as the ubiquitous and most popular free open source operating system, prided itself with supporting a staggering amount of different hardware architectures. For a time Linux was in a kind of "soft competition" with FreeBSD to see which one would support more computer architectures, and the list of supported such architectures was long indeed. Yet, for some reason, it appears that those times are slowly but surely coming to an end. The Linux kernel itself has been steadily dropping support for more and more old and obsolete computer architectures, which in many cases is understandable (particularly when their market share is completely abysmal and even that little is quickly diminishing). Also gcc, the ubiquitous compiler used mostly in Linux, has been dropping support for different processor architectures one by one. Perhaps not at the same speed as the kernel, but still. But that's not the major problem. Many of the biggest and most important so...