Does Seasons mark the beginning of story progression?

Well I hope you get the option but I also seriously hope it can be turned off. Nothing annoyed me more in ts3 than when the game tampered with my households(usually by moving them out or killing a sim off). One of my Sims daughters getting married and having kids with out my say so would be grounds for abandoning a save for me. :|

I still support having the option for those who want it though. As long as it is exactly that, an option.