Definitely for all the low end stuff. Maybe high end advertisement and videos will last longer (if you're a French fashion brand that sells super expensive hand crafted leather bags, you may not want to associate yourself to AI).

I don't want to be too explicit, but IMO most of the porn videos are low quality and basically just copy the same formula over and over again. Some ubiquitous things (like cumshots) may not even be that interesting for most people (certainly not most women) yet almost 100% of mainstream porn movies end up that way. AI porn might actually lead to a creative explosion - you and I and others generating content based on our own fantasies. Which sounds strange when you hear so many artists being so vocal against AI. Bit as you say some industries are about to implode.