Smart ass punks think they know *nix history.
I cut my wisdom teeth on a VAX 11/780 running BSD in the fall of 1984.
I PRE-DATE the GPL -- Ricky Stallman was just touring campuses (including the University of Saskatchewan) with his "new" GPL idea when I was learning *nix coding and the ORIGINAL K&R 'C' language.
I've run, coded, and delivered systems on just about every dialect of *nix that ever existed. I AM A DINOSAUR! A T-Rex that will eat your OS/X crap for breakfast.
FORTRAN, COBOL, LISP, Algol, APL, PL/C, K&R 'C', ANSI 'C', C++ (from 1.0), Erlang, Java (from 1.0), Z-80 assembly, 6502 assembly, PDP-11 assembly, VAX assembly, -- hell, when I was programming the Z-80, I didn't even *have* an assembler -- I converted my code into hex and POKE'd it into the machine and saved the memory image to cassette tapes!
RSX-11, BSD on VAX, VMS on VAX, AT&T SVR4, VMS on Alpha, DEC Unix on Alpha, HP1000/A, HP9000, the first release of AIX on POWER, Minux, Linux from Red Hat 5 onwards (including RHEL/CentOS/OracleLinux, Ubuntu, Debian, SuSE, Slackware, and a couple other distros whose names escape me at the moment), every flavour of Windows from 3.11 onwards, Mach (which is merged into OS/X), QNX (now Blackberry 10), SunOS, Solaris, Amiga, Commodore 64, Commodore PET, Apple II, and a few more that I can't remember the names of at the moment.
So go ahead and try to "tell me", kid. I'll run rings around you in coding, hardware, and experience. I GREW UP WITH THE HISTORY YOU ONLY HAVE READ ABOUT. I've been programming longer than most of you pups have been alive!
(Can you tell I'm pissed that some 7-digit luser tried to tell me I'm "probably not even a programmer"?