Hello all. I'm Mike. I've been working with React ever since it came out and have been in the web space even longer (going on 17 years I think). I'm a maintainer on the valtio library (mutable proxy state) and have authored many of it's eco system (https://github.com/valtiojs).
As an experiment to try some new ideas for reactivity for valtio, i created ripplio. It's very similar with it's API to valtio as far as its API, but it's very different under the hood. It automatically handles computed values via simple getters. It's in an early state but it's fun to play with!
