The failure mode with this approach is that it disallows coaching. There may be some bug in a library that's similar to what I do for my day job, and I spot it

The failure mode with this approach is that it disallows coaching. There may be some bug in a library that's similar to what I do for my day job, and I spot it immediately. Or perhaps I've seen the inevitable results of certain design decisions play out in multiple organizations. I may not have time to code up a patch. Frankly, I've got about 5 projects on the go besides work and kids. So, FOSS projects may lose out on that kind of expertise that could easily be crowd-sourced if it didn't ask so much of contributors.