I'm also wondering this. It's definitely not the same to land on a django1.3 app or a a django1.9 app.

Also, are you using python3? or python2?

Exactly. I'm stuck maintaining a legacy Django 1.3 system and its not ideal. I'm using Django 1.9 for other systems and it makes me a bit sad to work with the older version. I'd happy maintain a legacy system but it gets harder as security fixes become non-existant.