Having said that, I have no doubts that many would still do that, no matter how stupid and shortsighted it actually is as people nowadays are doing even worse thing, like keeping their bitcoin on the exchanges.
Yeah, people would surely do that if it ever becomes possible, anything to avoid taking responsibility and being their own bank. However, to have it suggested in a BTC forum is ludicruous, though i understand it is from a newbie who probably doesn't understand a lot of things about BTC and the cryptocurrency network in general.
Is bitcoin convenient for shopping?
I think not...
I don't see why it isn't, especially if the merchant uses a payment processor that converts it automatically to any currency of their choice.