[Answered ]-Capacity of Django Development server

you should definitely switch, django dev server is pretty much a toy, a simple single threaded server easily used for development, there are very few steps involved with serving your django application using apache –

If someone uploads a large image, the server will block all other requests during that time, I believe that alone is good enough reason to switch servers.

Additionally, advice from the first page tutorial in django documentation:

Now’s a good time to note: don’t use this server in anything
resembling a production environment. It’s intended only for use while
developing. (We’re in the business of making Web frameworks, not Web
servers.)