You're right. The preference would be that each person has access to a single part of the black box and no access to anyone or any other part of the whole shebang. Either that or the old way of dealing with people involved in things that have to remain secret. Of course, you behead enough OS devs and soon there won't be any.

As far as my daily life, no not really. I just live a life where I grant very few people a view into the things I consider private, and ensure that every two or three people know contradictory things without knowing the parts that put them together. It leads to a robust but distant social web.

The vectors I fear are the potentially malicious brains behind every pair of eyes. Why do you want to see my OS (or really any of my software)? The only reason I can think of is to have access to my files, or to hijack my machine and install customized ransomware as part of the OS. Therefore, any individual who sees any part of my OS that could grant them any access whatsoever to any part of my PC is an extreme and real danger.