There's a lot of appropriate blowback against stupid AI hype and I'm all for it. But I do think in many respects it's a better interface than (1) bad search results, (2) cluttered websites, (3) freemium apps with upgrade nags, as well as the collective search cost of sorting through all those things.
I remember reading some not-Neuromancer book by William Gibson where one of his near-future predictions was print magazines but with custom printed articles curated to fit your interests. Which is cool! In a world where print magazines were still dominant, you could see it as a forward iteration from the magazine status quo, potentially predictive of a future to come. But what happened in reality was a wholesale leapfrogging of magazines.
So I think you sometimes get leapfrogging rather than iteration, which I suspect is in play as a possibility with AI driven apps. I don't think apps will ever literally be replaced but I think there's a real chance they get displaced by AI everything-interfaces. I think the mitigating factor is not some foundational limit to AI's usefulness but enshittification, which I don't think used to consume good services so voraciously in the 00s or 2010s as it does today. Something tells me we might look back at the current chat based interfaces as the good old days.