I haven't regretted making anything open source. I do agree with the sentiment expressed here several times. Once my open source project gets popular it seems

I haven't regretted making anything open source. I do agree with the sentiment expressed here several times. Once my open source project gets popular it seems that there is a flood of incoming bug fix / feature requests and it is quite overwhelming. People expect you to just work on the open source library almost as it were your full time job (without a compensation). So that can be frustrating. This problem can be solved by finding skilled contributors who would be willing to work with you on maintaining the project but this can be quite difficult. Let's say your project is just reasonably popular (1-2 thousand stars on Github), you will be hard pressed to find willing contributors. It's much easier once the project gets very popular (5k stars I guess). It also depends on the language and niche of the library. Might be easier to find contributors in certain languages than others. Having said all that, my open source projects have actually paid me back in a way of interesting work opportunities that I wouldn't otherwise stumble upon. And it's a nice to have some reasonably well received open source project on your CV. Finally, I would like to shamelessly plug my project: https://github.com/RichardKnop/machinery https://github.com/RichardKnop/machinery Core contributors / maintainers always welcome!