As another side note, the idea of a UI that changes every time you open the site/app is, frankly, ridiculous. Not sure what kind of UX researcher or even user would want that. Seems like a saner approach would be one of two worlds below:
1) Each app has a carefully designed foundation on top of which user-customizable components exist. This is already common, sans GenAI-powered component creation.
2) There is no longer a concept of an "app." Users instead interact primarily with a smorgasbord of APIs, via their highly personalized but temporally consistent, AI-assisted personal OS.