Apple have removed a number of services from macOS Server and moved other services, such as content caching, to the “normal” macOS.
That doesn’t leave much. So, what do I get for my purchase? What are the added features/benefits of macOS Server versus regular macOS? Am I missing something important?
Edit
I have accepted an answer which basically says it’s no longer the same product.
A few years ago I actually paid for the product for the features they removed. It’s not a hardship as my main server runs Linux.
However, when I saw MacOS server in use in an office I thought it was an ideal alternative Linux to manage internal DNS, mail, file server, etc.