If you're interested in the technical coordination part of it you may be interested in the client diversity ideal that Ethereum has. Changes to Ethereuem don't happen by implementing the change on a client, but by updating a spec and then the ~5 execution clients or the ~5 consensus clients all update their code to become compliant.

It's a really high cost to pay, but in theory (assuming that the mix that is run is actually diverse) can protect against implementation bugs. In the browser world It'd be like running two different browser engines and only displaying DOMs that are consistent with both engines, or JS engine or final render etc.