1Hardgeneral⏱ 45sWhy is Flask's development server (`app.run()`) unsuitable for production, and what is used instead?📎▼AIt is fully production-ready as-isBThe built-in server is single-threaded/synchronous by default and not designed for the concurrency, security hardening, or performance production traffic requires; a WSGI server like Gunicorn or uWSGI is used instead, often behind a reverse proxy like NginxCFlask has no way to run in production at allDProduction deployment requires rewriting the app in Django