> People no longer want mixing. Anyone who disagrees about anything they believe is "toxic" or microviolent.

Well, maybe some are like that. They'll stop coming to your parties, or you'll stop inviting them, or you already know they are like this so you won't even invite them. The rest will keep showing up -- they're the fun ones!

> > Either ask people to bring a bit of food

> See my last point, they're too busy/tired. 1/2 the people bring chips and salsa they picked up last minute on the way there.

And that is fine, at least the first time. People learn and will not bring chips and salsa afterwards. Plus, the goal of the shared dinner is to have people over, not to enjoy fancy meals.

With this attitude...