What do you think it's the funniest thing in Sims2 that was removed in Sims 3 and 4?

Failure states. Those times when your Sim is going to have to persevere to survive and move on and want to go to work again, love again, get married again, have children again, eat again, have fun again. Without failure states there really is no point in playing all happy all the time. How can you have success without failure, light without darkness, ,,milestones met and adapt and overcome? The games are boring if it's all happy and the Sim never experienced the hardship of life and what it means to gamble in life and take a leap of faith.