I decided to buy a new Mac after 10 years (The other 4 still work fine for special equipment). I was surprised. I managed to upgrade every piece of software I expected to work. None came from the app store. (Actually, there is not much Apple software I use. The hardware works well, but they don’t support files created on old software. Some of mine are very old.)
(The computer was a Mac studio so all I would have older inputs I use)