I don't think the question would be whether the technology literally disappears entirely, only how important it is going forward. The metaverse is still technically here, but that doesn't mean it is impactful or worth near the investment.

For LLMs, the architecture will be here and we know how to run them. If the tech hits a wall, though, and the usefulness doesn't balance well with the true cost of development and operation when VC money dries up, how many companies will still be building and running massive server farms for LLMs?