Some of those are a bit too close to some of the actual advice I’ve heard:
“well, I suppose it’d be Ok as a shopping bike or for commuting but you’re going to need to get something for off road if you come out again” (aimed at my Swift after going out with a new group for the first time, the dispenser of the advice couldn’t ride his gnarpoon for toffee.
“you need to only look at 650b wheels or bigger” aimed at some newbies on £400 giant hardtails who were asking questions about what to upgrade to. I mean come on, we’d been riding the same trails for years on 26″ bikes, and now they’re no longer suitable? Because the group defiantly didn’t get faster. I told them to go on ebay and pick up a 26″ bargain.