How long would you expect a machine can be kept up to date with the latest OS? I have a Mac Mini from 2012 that has the security updates from 2022-05 and Catal

How long would you expect a machine can be kept up to date with the latest OS? I have a Mac Mini from 2012 that has the security updates from 2022-05 and Catalina, from 2019, but I have the latest version of Firefox that I use. The machine is perfectly usable and probably performs even better than day one given I put in an SSD in it. I bought it used for less than 300 euros with a wireless keyboard, and given the form factor, ability to use multiple monitors, great integration with my other devices, it wouldn't be fair to complain about a this 11 year old machine that still works as intended.