Agreed. In my opinion, the primary limitation of the porn models is actually poor labeling of the training set. The company that manages to produce a well-labeled, porn-tuned AI image model is going to absolutely clean up.
The extractive dark patterns that will emerge from a parasocial chat "AI relationship" that can generate porn images relevant to the chat on the fly will be staggering. Once that proceeds to being able to generate relevant video, all holy hell is going to break loose.
For anime/non-photographic content that essentially exists (Pony, then Illustrious, then probably some new-fangled thing by now that I don't even know about), thanks to the meticulously tagged booru image corpus. However, as strong as these models are on matters of anatomy and kinks, they're limited in other ways due to the hugely biased dataset and dependence on tag soup prompts rather than natural language (many find the latter a plus, not a minus, though).
I haven't heard of any proprietary/cloud-based NSFW model that would be massively better than what's available for free. There are many NSFW-friendly services, but by and large they're just frontends to models trained by other people.
I still think, even with that, that like most predictions of AI taking over any content industries, the short-term predictions are overblown.
Also, I suspect that we'll soon see the same pattern of open weights models following several months behind frontier in every modality not just text.
It's just too easy for other labs to produce synthetic training data from the frontier models and then mimic their behavior. They'll never be as good, but they will certainly be good enough.