Solaris _absolutely_ "went" open source in the form of OpenSolaris. Oracle re-closed it, but the main line of innovation in that line of operating systems (argu

Solaris _absolutely_ "went" open source in the form of OpenSolaris. Oracle re-closed it, but the main line of innovation in that line of operating systems (arguably all operating systems) is still open source in the form of Illumos.