Ability to "rapidly scale" is an overrated virtue. Scaling is exactly when you should step back and reflect on your architecture, at which point you should understand that very few of your scaling concerns are at the framework level. I continue to be involved with a 2+ million LOC Django site that's been 8 years under continuous development that went from 10+ million users to 100+ million a summer ago. Django was never the issue.

If the particularities of Django are what's in the way of scaling for you, you have bigger issues than Django.