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The Epochalypse: It’s Y2K, But 38 Years Later
(hackaday.com)
This is a most excellent place for technology news and articles.
People say it because it was a Windows limitation, not a computing limitation. Windows Server had support for more, but for consumers, it wasn't easily doable. I believe there's modern workarounds though. The real limit is how much memory a single application can address at any given time.