As I explained in another post, I usually use the section element to include the all of a page and I ‘d like to use the « main » tag ( HTML main Tag ) for this element, as I use the « section » tag for the container.
There are other tags that could be useful, as the « header » one ( HTML header Tag ) inside the Tag « article »
I don’t recommend doing this, because then you will have two main tags in teh dom. The first one is automatically created and holds all content. Please check a screenshot of what would happen: