[rtpg]

generic relations are hard to get right, really if you can avoid using them you're going to avoid a lot of trickiness.

When you need them... it's nice to have them "just there", implemented correctly (at least as correctly as they can be in an entirely generic way).

Model validations is a whole thing... I think that Django offering a built-in auto-generated admin leads to a whole slew of differing decisions that end up coming back to be really tricky to handle.