For me, it's a bidet toilet seat. I bought one that didn't really fit as well as I hoped, so now I am shopping for a v2 based on experience. I don't want to live without one going forward. That's for sure.
My Instant Pot. I’m the cook at home and it saves me so much time and food comes out so good I barely use my stovetop anymore. Same with the air fryer. Between both kitchen gadgets, I can make a tremendous meal for 4 in 30 minutes. It has saved me weeks!