I remember seeing an interview with the model, who at the time of the interview was in her 70s or 80s, she apparently wasn't enthusiastic about having become a common test image. But since she had technically consented to be in Playboy (which was only a magazine at the time), there wasn't anything she could do to stop it. I think in this case it's probably best to stop using her image specifically, as it does kinda get into a weird messy situation of consent, and how her consent to be in a magazine morphed through technology into something more "permanent" than she originally realized. There are plenty of other models who would absolutely be down for that, and given enough time, knowing how nerds are, there will be other test images of women. But I think it's probably for the best that this one gets retired from this use.

And yes, there are people who have tried to use this instance as a "there shouldn't be images of attractive/implied nude women a standard test images, because it can cause body image issues for women who go into that field." Which on one hand, I can see where they're coming from, but also people take pictures of people, and some people do look better than most of us, having more diverse test images would be a good thing, because we don't all look like that. But some do, and they're probably going to get more pictures taken of them than the rest if us.