Every year when you clean for Pesach, the same question occurs to you: “Should I start cleaning even earlier next year?”
This is the only Yom Tov that people want to go beyond the 30-day thing. No one says, “Maybe we should start building the sukkah over the summer,” or “Why can’t I start being marbin b’simcha on the 11th of Teves?” or “I need to start doing teshuva on Shushan Purim. 30 days is nowhere near enough for me,” or “I think I have to start eating way more than 30 days before a fast!” Generally, 30 days is more than enough. The only other Yom Tov that we really lean into prep time is Simchas Torah.