No. SEO is not disappearing. It simply ceases to be the only useful framework for reading the problem.
GEO and AEO remind us that enriched engines, generative systems and other response layers now read sites through uses far broader than classic indexing. This does not make SEO useless. It rather forces us to widen the lens toward an interpretive SEO that also covers AI-based reading.
When the site is structurally weak, neither SEO, nor GEO, nor AEO alone is sufficient. You first need to clarify the offer, strengthen the corpus, surface the evidence and stabilize interpretive governance.