Secure Boot and the 2018 MacBook Pro
Summed up in one word: Scary.Maybe Apple users are not as concerned about being able to run other OSs, but there was a huge uproar a few years ago when secure boot was first introduced to PCs. Fortunately you can still turn it off, but its removal may be associated with an ostensibly compelling argument: "why would you not want security?" The answer to that can also be summed up in one word: freedom.