I used to leave cuttings in water for months, but I had brugmansia cuttings rot on me last fall, and lost a couple this fall also despite frequent (3-4 times a week) water changes. So I got nervous about leaving Stush's leaves in the water once they started to strike roots. I'm so excited that one has a baby sprout!
There's another tall slender leaf that's still in an inch of water -- no sign of rot, but no sign of roots either.