I'm sure Plan 9 is cool and all but y'all Plan 9 nerds are like dudes who keep pushing network TV for a Barney Miller revival even though like the entire cast has been dead for years :-D <3
Good ideas are worth preserving. And preserving these ideas means keeping the discussion alive. Drew mentions in the article that quite a lot of ideas have since ported in one way or another to other unices, but Plan 9 was more than just the sum of its parts. More of a product of its parts, if you will, heh.
Last I checked the Fish shell had many users and an active community.
Man, that Barney Miller comment was too close to the bone!