Not always, sometimes you cannot see the proof because a company just doesn't offer any other options. If there was a modern laptop that ran macOS that was user

Not always, sometimes you cannot see the proof because a company just doesn't offer any other options. If there was a modern laptop that ran macOS that was user upgradeable, I would absolutely get it in my next upgrade cycle. Alas, there isn't one. Also companies aren't always superrational logic machines that have coldly calculated their every more; there's sometimes a lot of collective delusion going on that can leave their consumers in the cold, who then just make do with the best out of a bad lot that's offered. Recall the recent iPhones - suddenly every other phone had a notch even when it served no purpose; or the removal of audio jacks, for example. There was NO consumer preference expressed there, just one company that decided it that way for its own purposes, and others blindly copying it.