This ridiculously expensive, cordless robotic cleaner is essentially a fancy underwater vacuum that preens about its 'industry-leading' sensors. Newly arrived, sun-drenched millennials treat it as a necessary accessory, because nothing screams 'effortlessly affluent' like a piece of tech that only works if the water is chemically balanced. It’s how you subtly signal that you don't lift a finger, which makes you spiritually superior to the neighbors still using push-vacuum rakes. However, the sheer cost and delicate electronics guarantee it will fail spectacularly the moment a passing desert jaguar wanders into your backyard pool and disrupts the infrared beam.