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Nearly 20% of Microsoft SQL Servers running have passed end of support
(www.theregister.com)
This is a most excellent place for technology news and articles.
I don't know what they're talking about there, but that might just be ignorance on my part, because I'm not a database administrator. For the basic use cases, SQL hasn't changed in decades. For simple applications you could even change from MSSQL to MariaDB to postgres and make only minor changes.