I think this quote sums up Django very well. I would guess that a large chunk of externally facing and internally facing web apps use django (e.g., apps at Mozilla [0]). Anyone have a link to numbers? It would be neat to quantify the prevalence of frameworks on the net. Someone must have done this already.
[0]: https://www.djangoproject.com/weblog/2015/dec/11/django-awar...