As far as I'm aware, article and section don't do anything for screen readers. Someone please correct me if I'm wrong on that.
On the other hand, nav and banner (among others) are types of landmarks. It's nice to have those, but the one that screen reader users will want all the time is main.
On the other hand, nav and banner (among others) are types of landmarks. It's nice to have those, but the one that screen reader users will want all the time is main.