Time machines obviously exist....
"A 2015 audit found that ACIS, a Solaris environment that dated back to the 1970s,"
Even some basic date checking on Wikipedia by an editor should have flagged up some changes were required in that 2015 review.... or maybe it was a sign of the review quality...
And here's me thinking we were early adopters of Solaris 2.1 - seems someone was already using it 13 years before Sun even released SunOS.......