I wonder by what year it would be impossible at a hardware level to do that. Apple has already been making MacOS more or more like its phone OSes, raising the w

I wonder by what year it would be impossible at a hardware level to do that. Apple has already been making MacOS more or more like its phone OSes, raising the walls of the garden. They might soon implement some privacy/security 'think-of-the-children' type 'feature' that makes it basically impossible to install any other OS on your Macbook.