Reasoning
Google Search's AI Overview (launched mid-2024) has shown mixed early impacts on CTR based to-date publisher feedback—some reporting 10-20% declines while others see minimal changes, with significant variation by query type and industry. For a >40% reduction by 2028, this would require both accelerating adoption (currently ~10-15% of searches) and substantially more direct-answer optimization than current evidence suggests. Historical precedent from featured snippets (introduced 2014) shows they initially concerned publishers but never caused 40%+ CTR declines industry-wide; instead, search behavior stabilized with publishers adapting content strategies. Regulatory pressure on Google (ongoing DOJ antitrust case, EU scrutiny) and publisher legal actions may force modifications to AI Overview formatting or prominence before 2028, creating structural headwinds against such extreme CTR loss.Key uncertainty
Whether publishers collectively sue Google successfully to restrict AI Overview display, or whether Google voluntarily redesigns the feature to show less complete answers—either could prevent the 40%+ threshold from materializing.