As much as I think he could have handled the transition a little more gracefully, it's good to see an open source maintainer recognizing when they are no longer making their life better by working on a project.

So many open source devs burn themselves out by continuing to work on projects that no longer spark joy out of a sense of obligation.

This also should be a reminder to the community NOT to harass devs if a project is making choices you don't agree with. The reason most maintainers contribute to open source is the hope that people will like and use their software. Getting messages that indicate people don't like their work and won't use their software is the quickest way to kill someone's enthusiasm for their little corner of FOSS.