I feel obliged to point out that this blog post is roughly 2 years and 2 months old. People change, opinions evolve. In just a few years, vast technological landscapes can shift. And don't get me started on config files. Please consider this text in the context of its time.
There is an important note in footnote 7 on page 40 of the “Oracle and Sun System Software and Operating Systems - Oracle Lifetime Support Policy”: “As a result, Support dates are evaluated for update annually, and will be provided through at least the dates above.” Well, Oracle has just extended the extended support for Solaris 11.4 from 2034 to 2037.