A small gripe: I don't get why Django has to get dragged into this. Whether it's the title, or the venue. It distracts from the broader lessons he brings to the table in hindsight as a CTO-founder.
Other than the author making fleeting references to Django, there's no technical depth or major points delivered on how the stack effected operations.
I have nothing wrong with Django criticism, but the title needs to be fixed. Maybe: "Autopsy of a slow train wreck (DjangoCon 2017)"