

Protocols are much more difficult to create and implement.
The barrier for technical ability and maturity is much higher. Which is why you don’t see them as often, and when you do see them they tend to suck, have massive gaps, or some other significant failing that prevents them from really scaling out.
Building reliable and robust protocols with a hobby project is a nearly impossible task, it takes a lot of effort and a lot of minds over a long period of time to settle on the specifications. And just as long to actually implement it.
Usually this requires some sort of funding and dedicated resources from the get-go. Which many of these projects lack.
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