i never got on with plan9 and acme. I havent used it much but I thought acme was too reminiscient of emacs without actually getting there :(

posix as a standard definitely has some issues, but i think that at least there is a standard thene at all. The situation is a bit to close to the browser wars in my eyes but as long as my scripts run on linux and bsd im happy .

(also this absolutely fits here, it is a great introduction to the opinions of forum members , all 2 of you ;))