I would never trust a fully automatic fire alarm system. The same way I would never trust self driving cars. If pull stations were to become obsolete, what would we do in the event that the automatic detectors malfunctioned and failed to activate? We wouldn’t have any other means of notification unless one wanted to run all the way to the panel to press the drill button. Now I’m not saying that we shouldn’t try automation with pull stations, but no pull stations is a bad idea.