It’s a bubble. “AI” could be quite successful at this point, and the economics still don’t work out.

The dot com boom was a bubble. Doesn't mean that the underlying web technology that powered it was bad or worthless. But the valuations definitely were. AI, in its current form, will be around for a long time, maybe even as ubiquitous as the internet is today, a few decades from now. But the situation right now can definitely be classified as a bubble.