I see a pretty clear analogy to the various industries that felt threatened by home video and audio recording improving to the point of being able to make copies quickly and without significant degradation--particularly when disc ripping at 20x+ became a thing and time wasn't even a barrier.

A person who can clone a style and crank out illustrations at human speed is a very different thing than an automated process that can do it immediately on request, in minutes or seconds. If nothing else, the latter is a huge efficiency gain for being able to self-serve, as it would allow an editor to trial different illustrative approaches without all the back and forth contracting out to a human would require.

Personally, I think what this will do most is convince artists not to put galleries of their work suitable for training online.

The Redditor identified in the article posted a new comic art model based on James Daly III (this is mentioned at the end of an article with a link). The Redditor's comment in that post implies Daly was chosen specifically because they had a gallery of easily consumable training images all in one place.

I have no idea what the minimum effort would be to make the images less useful for training, but I foresee a lot of obnoxious watermarks in our future as people try to do so.