I Used AWS Cognito for a Startup. I Wouldn't Do It Again

The author spent weeks battling AWS Cognito’s fragmented documentation, which mixes outdated SDK examples and assumes prior knowledge, causing basic tasks like password-reset redirects to fail. A later upgrade from Amplify v5 to v6 broke core authentication methods, forcing a complete rewrite, while Cognito’s cloud-only nature and unreliable local emulators made offline testing impractical.