There are some plants that can live in definitely in water. There are many reports of Pothos & Philo vines living for decades in various vessels of water, and countless other less long-lived endeavors. I think my longest was about 8-10 yrs. The end usually comes when there's a lapse in remembering to add water, the plant gets so heavy that it pulls itself out of the water, or gets ill from accumulated toxicity from some chemical in tap water.
My current longest-lived water plants are a jar of vine cuttings snipped a year ago with the intention to start a new pot, then deciding I liked the way the jar & the cuttings looked where they were, and they've just been there ever since. I've never changed the water, just add to it. It's clear and clean looking and the plants look normal, though they grow very slowly. Shoot, I got a phone call while typing & need to go. More next time, & maybe a pic.
