One of the old objections to UNIX was that there were so many variants. The fact that lex, yacc, vi, troff, and other commands ran uniformly across all of them didn't cut the ice. The plate of spaghetti here represents most of the variants and the cross fertilization. Minix shouldn't be free-standing: it arises from V7 from Bell Labs. I miss Dell UNIX, the best n86 version of SVR4.
But the really important thing is the fact that every one of these streams is used for Web hosting; and that the UNIX+Linux systems total a remarkable 64% of all sites. In other words, just about two-thirds of the Web is powered by UNIX or Linux.
Not bad for an upstart.
— Peter Salus