Second this. Mithril.js is absolutely incredible, and my coworkers are often surprised at how quickly I can dive into a React project and fix an issue because I don't carry the baggage of doing things "the react way".

Every now and then I use software tools where rather than complaining about how x or y should be different, everything seems to be the best possible version of something I'd have come up with myself, and I have zero complaints. Mithril.js is one of those tools.

You're not "in a Mithril project", you're basically just using javascript but the VDOM is expertly and minimally handled by some key functions.

Participating in the project via Gitter was very welcoming as well. Long live Mithril!