I don't even think cost benefit is the driving factor. I think making tools is why a lot of devs maintain their interest. For any given task you'll find 5 co

I don't even think cost benefit is the driving factor. I think making tools is why a lot of devs maintain their interest. For any given task you'll find 5 commercial solutions that basically make it 1-click, if you're lucky a few FOSS equivalents, and 5000 abandoned github repos that implement one or two specific features in the commercial ones. Devs(In general, not myself) don't want debuggers, they want printf. They might want Linux, but they probably like their own DIY hobby OS more.