Comment by zimablue

As a counter point, I tried to use Django for a data-visualisation project and ran into some problems. Everything is built on models, which are kind of activerecord pattern. Django has an inbuilt (and inferior) version of sqlalchemy, so that when you want to push sql past a certain point (define queries more complex than the api) you're pretty much stuck. Now you have codebase with two different database libraries in it. You're probably using an spa so all the view stuff isn't helping, and Django kind of infects your code because it won't run without an initializarltion step so if you have a module importing something that imports Django, any time you use that it needs to initialize Django itself. I don't think that these are mistakes, just choices that they made that make it very good for websites up to a certain (sql/data) complexity and very annoying afterwards.