Unix has retarded OS research by 10 years and linux has retarded it by 20.
Any editing, software work, and mail is done in this exported Plan 9
C was already implemented on several quite different machines and OSs, Unix was already being distributed on the PDP-11, but the portability of the whole system was new
C is quirky, flawed, and an enormous success.
Sometimes when you fill a vacuum, it still sucks.
UNIX is basically a simple operating system, but you have to be a genius to understand the simplicity.