Example: I was recently working on a large project that needed a specific version of Python, and there's a lot of ways to solve that, but mise was an easy and robust one. But also, the project needed a bunch of different tools to build it, deploy it, do local dev, perform certain maintenance tasks like rotating secrets, work through certain operational runbooks, etc., and mise was an easy and robust way to solve that too. Once you know everyone on the team will have the same tools available, if a runbook would be simpler if you could assume everyone has jq installed, well, just add it your the project's mise config, and now they do. And then when I switched to working on a Java service, and then later a Node service, well, obviously mise was an easy and robust solution there too.
By contrast, I made an effort a year or two back to adopt nix, which (despite starting from a very different place) solves a lot of similar problems, but found it a bit daunting (large, complex, poorly documented, and felt hard to partially adopt), and while I love the concept of nix, as a practical matter I ended up abandoning the effort. But mise was really easy to understand, adopt, and progressively add to an existing project without unduly impacting other team members. (Example: Mise will read existing verion manager configs from tools like sdkman, which makes adopting it over time easier.)
It's got to the point now where I'm using mise in place of Homebrew or other system level package managers for basically all CLI tools. Which feels weird when I think about it, but mise genuinely just feels like the better solution. If mise has a flaw, I haven't stubbed my toe on it yet.
One of my concerns was about how well maintained Mise would be given that it's mostly a single maintainer, so I think this is good news in that respect.
Good luck to Jeff!
Edit: mise rocks.
