Jazzband's model was interesting precisely because it tried to solve the bus factor problem by distributing maintainership across a community. The fact that it's sunsetting suggests the problem runs deeper than just individual maintainer burnout.

The real gap is that there's no natural mechanism for projects that are critical infrastructure for many companies to capture even a tiny fraction of the value they create. pip, Django, and the whole ecosystem that Jazzband helped steward are worth billions in aggregate business value. Their maintenance costs a few thousand dollars a year in volunteer time.

I don't think licensing changes alone fix this. Companies have legal teams that can route around them. What might actually work: large package registries (PyPI, npm) implementing a voluntary but strongly encouraged funding mechanism where companies self-report their usage and contribute to a foundation pool. It would need to be opt-in and friction-free, but even 10% adoption from mid-sized companies would transform the economics.