Oracle is shutting down SPARC and Solaris. Good bye, Sun. It was nice knowing you.
Oracle shuts down SunOS aka Solaris and SPARC because Linux is a much better OS and Apple got the Unix Workstation market locked down so nobody else can touch it.
A lot of technologies made by Sun, Oracle has shut down since they bought out Sun. So this is no big surprise.
One odd thing is that Sun made embedded Unix systems for the US Military using SunOS / Solaris and now there will be no more support for them. I guess the Military is moving to Linux instead?