Considering I've kind of dismissed discussing UNIX in the original post, let's bring the discussion towards it.
We were recently discussing the UNIX® certification and it's link with the industry and government, the role it plays today. How the UNIX trademark has nothing to do with the historical lineage but with standardization of interfaces. How some people get pedantic about history. We've also been discussing some things related to the UNIX war.

A couple of articles and online discussions (with the usual flaming tone that they take) are relevant:

• Did Linux Kill Commercial UNIX
  
• r/unix Is true Unix (not linux or BSD) still used today?
  
• r/linux What is the point of UNIX® certification?
  
• r/unix How does a "real" Unix system feel compared to *BSDs and Linux?
  

Personally, I've seen a lot of Solaris boxes installed at mobile operators and government related businesses. It's getting more rare though and most are opting for RedHat with a professional support subscription.

In all cases, Unix-like systems have definitely a place to play in the industry today. Which UNIX® or Unix-like systems plays what role differs.

What's your take on this? Which systems do you encounter in your day to day job? Do you see the usefulness of support contracts or standardization bodies?

PS: Be courteous 😁.