Django 4 dropped PythonA high-level language known for readability — dominant in data science, scripting, and web backends. 3.6 support and modernized defaults: stdlib timezones replaced pytz; scrypt strengthened password storage; RedisAn in-memory data store — used for caching, queues, pub/sub, and real-time features. became a built-in cache option. It powered admin panels, RESTRepresentational State Transfer — a style for web APIs using HTTP methods and resource URLs. APIs, and CMSContent management system — software for building and publishing websites without hand-writing every page. backends through the early 2020s.

Django 4 was the PythonA high-level language known for readability — dominant in data science, scripting, and web backends. 3-only cleanup that aligned with modern deployment practices.

Built-in RedisAn in-memory data store — used for caching, queues, pub/sub, and real-time features. caching and zoneinfo simplified production Django stacks.