One downside for diffusion based systems (and I'm very noob in this) is that the model won't be able to see it's input and output in the same space, therefore w

One downside for diffusion based systems (and I'm very noob in this) is that the model won't be able to see it's input and output in the same space, therefore wouldn't be able to do follow-up instructions to fix things or improve on it. Where as an LLM generating html could follow instructions to modify it as well. It's input and output are the same format.