There's in fact a Stable Diffusion model trained on most of e621. Uh not sure what HN's linking rules are, but look up Furtastic.
Though I understand and respect furrydom, I'm not a furry... But in its niche of generating anthropomorphic people, I still find the model to be incredible. Its got to be one of the most extensively trained, tagged and coherent SD 1.5 finetunes out there, which doesn't even surprise me TBH.