The thing is that this is increasingly not true, hasn’t been true with blockchain and crypto that was all garbage and no substance, not with the metaverse hype, not with any of the hype Elon Musk tried to create (hyperloop?) and not with AI as a worker replacement.

There just isn’t any useful bit that sticks around in many cases and where there is those useful bits were never part of the hype or have been around for much longer than the hyped part.