Robot vacuum. I got the Eufy Robovac on a black Friday sale and have never fucking looked back. Those things are magic, especially if you have a kid or a pet.
Robot vacuums are a GAME CHANGER. You can clean the whole house's floor while doing something else. You can clean the floors so frequently with ease, the floor is always clean when guests come over. Under the couches gets clean so you don't have wandering dust bunnies. It's GREAT.