One pattern I've seen kill smaller open source projects that isn't mentioned: scope creep driven by the most vocal users.
A focused tool that does one thing well starts getting PRs and issues for tangential features. The maintainer, wanting to be responsive, merges them. Six months later the project is a Swiss army knife that's hard to maintain, hard to onboard new contributors to, and the original use case is buried under complexity.
The antidote is a clear CONTRIBUTING.md that says "here's what this project IS and ISN'T" and being comfortable closing issues with "out of scope, but would make a great separate project."
Easier said than done when you're a solo maintainer and every closed issue feels like you're letting someone down.
A focused tool that does one thing well starts getting PRs and issues for tangential features. The maintainer, wanting to be responsive, merges them. Six months later the project is a Swiss army knife that's hard to maintain, hard to onboard new contributors to, and the original use case is buried under complexity.
The antidote is a clear CONTRIBUTING.md that says "here's what this project IS and ISN'T" and being comfortable closing issues with "out of scope, but would make a great separate project."
Easier said than done when you're a solo maintainer and every closed issue feels like you're letting someone down.