Looking at pass OSes three years from first release is about when the OS security updates stop. Safari 15, which runs on Catalina got an security update Aug 2022. For the most part you can go the later OS until nearly the 10 year mark (from original release) on hardware. I would say that is a good run.That's almost 2 months ago, in what world is that too short? Just look at the history of patches they typically are 2 months apart, and you'll also see they have always updated the 3 OSes at the same time: https://support.apple.com/en-us/HT201222
This very much feels like it could be the end of Catalina.
You don't want OSes being supported for 12 years like Microsoft did with Windows XP because it encourages businesses to do stupid things — namely not upgrading anything resulting in "Outdated technology costs businesses more than it saves"
Another article claims "A recent survey found that U.S. businesses may be losing up to $1.8 trillion in wasted productivity due to outdated technology"
Three years is a sane run for an OS and 9 to 10 years a good run for hardware. Anything beyond that is crazy.
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