Brace yourselves, AI Winter is coming.
I've been making a living with many of the tools and techniques from prior to the original "AI Winter" -- but the companies that produced them and that were promising expert systems and other forms of knowledge engineering have very few survivors.
When Meta, which is basically dying advertising company, is promising AI as it's core innovation center, we know that it's a shibboleth for signaling some participation in a notional future economy.