The bulleted list of issues with QR codes seems a little petty or at least very specific to me. I have no hard data to support my saying "the majority of people

The bulleted list of issues with QR codes seems a little petty or at least very specific to me. I have no hard data to support my saying "the majority of people have phones", but I don't think it's a controversial assertion, and I think sharing phones with people you're having dinner with is a non issue, should ypu need to do that. I don't think it's the barrier of entry the author feels it is. I see a switch to QR codes as a big positive. Even the author argues for how much paper it will save.