prior to asp.net mvc or those master page things, every asp.net project I ever worked on eventually had a base webform which was the dumping ground for everything and thus nightmarish to comprehend or maintain. Django's CBV's remind me of that nightmare and I tend to avoid them because it feels like reinventing a poorly designed wheel with no real value.

I occasionally see comments on threads claiming they are the best thing since sliced bread, but rarely can anyone back it up convincingly.

So, to me they feel like a fad, and should be avoided IMO.