Millennium Edition or whatwasit was playable, when you learned to circumvent worst remaining bugs. And the idea is thrilling even now! Massive ship with crew management, launchable fighters and shuttles that you or ai could fly, planetary landings, automatic miners... It was (is?) THE dream!
I'd give a kidney if some grown-up software company offered to create the game Derek Smart thought BC3000AD was. Even if they put the FSS in it!