The lesson presented by the last few big outages is that entropy is, in fact, inescapable. The comprehensibility of a system cannot keep up with its growing and aging complexity forever. The rate of unknown unknowns will increase.
The good news is that a more decentralized internet with human brain scoped components is better for innovation, progress, and freedom anyway.
I'm not sure how decentralization helps though. People in a bazzar are going to care even less about sharing shadow knowledge. Linux IMO succeeds not because of the bazaar but because of Linus.