alt Hacker NewsI'm trying to understand the point you're making here but don't really get it. The OS is just software, in most circumstances. Most modern OS require at least one binary blob that has to be sent to some hardware device. This is mostly because the the device manufacturer didn't want to include NVRAM and at the end of the day is usually just software as well.
their point is that lots of things everyone thinks of as "OS" things like "tcp" and "doing file IO" can just be done in user space by some new program without the processes that make use of these facilities knowing or caring.