Macintoshman, yeah what I love about Solaris is how you can use programs from previous versions just fine, there's a standard packaging system, and in general, compatibility is excellent. Even Solaris 10 today still has SunOS 4.x compatibility (hint: SunOS 4.x became Solaris 1.x). You can run programs from even the late 1980s on modern Solaris releases. Try that with an early Linux program without recompiling.