Hi
the list of upgraded features is listed here:
https://learn.microsoft.com/en-us/windows-server/get-started/whats-new-in-windows-server-2019
Its really down to whether your organization would benefit from any of these features (none of which are linked to Active Directory which you specified in the question, as there is no higher AD Domain level than 2016 at the moment). The Security and Compute ones are beneficial.
Also, reminder that Server 2016 EOL is not until Jan 2027
Hope this helps,
Thanks
Michael Durkan
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