Interesting. I am not arguing, just sharing: people say that Drupal now is a framework and you an actually write custom stuff, not just stack modules. Can that be, what do you think?
Yes - that is what is being said about Drupal 8 but I see it more of a shoehorning a CMS into a framework. Custom modules can be written - but doing the same in Django is much easier.
One approach that you can also look at is build the platform as an API in Django and build the wrappers / customizations for the sites in Drupal.
Actually it's always been a framework, it's just there's lots of shoehorning of CMS functionality. And it's less of shoehorning, it's just where the $s are flowing, I work with a team who do a lot of native CRM & BPM with Drupal it's just they haven't got $m so you haven't heard of them.
Drupal's fundamentally different than Django as not only are you able to code less due to the sharing of modules but you're also collaborating with thousands of others.
So with Django where you're coding coding coding, i.e. creating technical debt, the idea with Drupal is you only need to code what business logic hasn't already been built over the last 16 years. You're leveraging code and community, so you can focus on what you're good at and collaborate with thousands of others to fill the gaps.
One approach that you can also look at is build the platform as an API in Django and build the wrappers / customizations for the sites in Drupal.