> Obviously they turned out not to be necessary. That is not at all obvious. There's a reason SQL is a thing. There's a reason that file name extensions are

> Obviously they turned out not to be necessary. That is not at all obvious. There's a reason SQL is a thing. There's a reason that file name extensions are ubiquitous. There's a reason that security is a hot mess. It turns out that you really do need all these things, and if you don't provide them in the OS, then they will need to be provided at the user level.