Still 6 years of support. They can't support every Mac for ever. Maybe we don't like but it's how it works. My 2012 15" retina MacBook Pro is still supported until the release of Ventura. That's 10 years. Some get 6 others a little more and others a lot more. It depends on the "lines" Apple traces on the sand. I don't know the reason but that's how it is.
I'm not complaining. I'm arguing against the belief that any Intel Mac will be supported until 2029 or 2030.
Officially, 2012 MacBook Pros only got up to Catalina which was released in 2019. It didn't get Big Sur or Monterey.