In fact, I think it will have more staying power than most, if not all of web dev domains of expertise.
Theres simply no "soul" behind llm crafted websites. There are companies out there, like lovable et al who sell the idea that web design is solved but are still hiring six figure retainer design firms to do their frontend.
I believe the best web platforms will heavily invest in human crafted UI/UX because that is what will make you stand out. The rest will get thrown on the slop pile and forgotten.