At one point in time the conventions were actually used by local party bosses to wrangel over platform issues. There was also a point in time when the Presidential candidate wasn't known for months in advance.
In many ways the conventions are anarchronisms. They are theater, pure and simple. But nobody really watches them. I suppose if we didn't know who the candidates were going to be 4 months before the convention date then they might still be of us to the public.
All the convention seems to be good for is lots of stock footage of middle-aged folks dancing, badly, to bad remakes of popular songs.
Stop drop and roll will not save you in hell. --- seen on a church marque in rural Virginia