Some people think its Victor because he keeps coming back.
It's not the same thing as being "essential". But then again, that could possibly be what Obsidian was referring to.
Oh that svcks! I want to actualy have a challenge, without having to worry about food sleep etc!
That stuff is hardly an issue. I barely notice it at all, and it at least gives me a reason to create more than drugs with survival.
Or you could just mod it so your companions aren't essential in both modes.