This is completely missing what is likely the primary obstacle to adoption, at least in the US. Apple and Google require an entire state to commit exclusively t

This is completely missing what is likely the primary obstacle to adoption, at least in the US. Apple and Google require an entire state to commit exclusively to using a single app. Even though they use a protocol that would easily interoperate across jurisdictions and apps effectively. City governments which could move much faster are unable to do anything. States are on fire dealing with others things. They also all want some smaller scale trial to happen first, but no one can do that according to Apple/Google policies. So they are all stuck in a chicken and egg problem... (This is all according my sources working directly on such apps which were ready to deploy 3 months ago — but were completely stopped by the policy; I'm interested to hear if anyone is aware of reasons why this might not be accurate).