The main problem is, those AI generated images are only so jarring because they're so obvious.

As time goes on they'll be harder to spot. We're going to need a new way of determining quality as such obvious signals have a limited shelf-life.

Not that AI generated images are always bad. They are perfectly acceptable if used for (not an exclusive list): small separators between sections in large blog posts, or other decorative features; used to illustrate things for which no real image exists (as long as it's labelled as an impression/reconstruction/etc.). They're only really a negative signal if they're used dishonestly, to claim something existed when it didn't, etc.