Solaris isn't dead. Oracle released version 11.4 in August this year: https://blogs.oracle.com/solaris/oracle-solaris-114-released...

The article you linked to doesn't say Solaris is gone either. It mentions large numbers of layoffs, but acknowledges that there is still a Solaris dev team in place (even if a significantly smaller one).

(Disclosure: Former Oracle employee, although I never worked on Solaris.)