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Subject: Re: [bitcoin-dev] Even more proposed BIP extensions to BIP 0070
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On 06/22/2016 04:25 PM, Erik Aronesty via bitcoin-dev wrote:
> 
>     Only large merchants are able to maintain such an infrastructure; (even
>     Coinbase recently failed at it, they forgot to update their
>     certificate). For end users that is completely unpractical.
> 
> 
> Payment protocol is for when you buy stuff from purse.io
> <http://purse.io>, not really needed for face-to face transfers, end
> users, IMO.

What Andy said, plus there is an (unencrypted) version of BIP70 via
Bluetooth already in place. And its used in several thousand
face-to-face trades per day.