Like, what? Solaris/SunOS, DEC Ultrix/Tru64, AIX, HP-UX, Xenix, etc., all with big bad monopolist AT&T's UNIX as their grandpappy. UNIX was corporate to the hilt.
Corporate, sure, but painting DEC, (old) HP, and Sun with the same brush as AT&T, IBM, and Microsoft just because they sold proprietary, but generally well-documented and reliable hardware and software at whatever prices the market would bear seems unfair.