That's not really how the whole scene works. There's little upfront demand for such rigour, because the potential userbase for any given coin largely don't know

That's not really how the whole scene works. There's little upfront demand for such rigour, because the potential userbase for any given coin largely don't know to demand it. Instead, poor implementations fail and either get discarded or patched, and eventually, hopefully, whatever remains will be solid. What I'm trying to say here is, the whole cryptocurrency field is much, much messier than you seem to expect.