... and I really like it! Plume is minimalistic, but super-responsive. I would love to try out a few UI variations, possibly add some features (e.g. in-screen media management) and streamline some tasks (why does it take multiple clicks to start a new post?). I was doubtful, before, whether I would like the quite neutral and uniform design, but medium seems to get away with it, so I'm guessing it's ok. Just tiny amounts of per-blog design customization (e.g. a header image) would go a long way to making a Plume instance feel more personal. Also, apparently renaming blogs is not possible, which is a huge shame.
Overall, I think plume is off to a good start, and I hope it becomes a thing in the chaos community! Then again, my posts so far could have also fit in toots, so not much is lost here.