I'm glad you commented, because the GP comment originally had at the end something like, "With one caveat---I still haven't given Elm a fair shake." Then I thought, "Nah, too esoteric for HN, I don't want to dilute things" and erased it. Joke is on me! I do hope to be able to make the time to play with Elm at some point---at one point I was very excited about FRP, and what took me away was time, not some fundamental, principled thing.