We needed to restore some data from backuped Oracle. We had available SPARC server with Solaris 10 already installed but backuped Oracle was running on Solaris 8 SPARC. We tried it anyway - after product and data files were restored from backup everything just started so we could get our data. To be clear - we run Oracle binaries for Solaris 8 on Solaris 10 without any problems. Wow! - ok, I was actually expecting this :) Another real life example of Solaris famous backward compatibility.