But is it still running on Cern/3.0, installed circa 1993. Ours is:

  $ nc www0.cs.ucl.ac.uk 80
  HEAD /staff/m.handley/ HTTP/1.0                    

  HTTP/1.0 200 Document follows
  MIME-Version: 1.0
  Server: CERN/3.0
  Date: Fri, 14 Feb 2020 17:02:59 GMT
  Content-Type: text/html
  Content-Length: 9185
  Last-Modified: Sun, 16 Jun 2019 15:27:37 GMT

It's running on Sun Sparc hardware from the same era, and has been in active use for all of those 27 years.