UNIX: an operating system designed for mainframes in the ’60s. clearly perfect, and never needs to change or alter or improve its underpinnings in any way, shape, or form. Plan9: Let's make a new Unix out of a bunch of Unixes glued together
- capability-based microkernel
- APE-style userspace
- distributed trust, naming, &c.
- eventually consistent distributed service management
- ruby-like syntax, functional programming, powered by scheme