Way back in the day when hub first was a thing, I think I remember that when you hit "Publish" It would publish all of the pages in the hub. Now you can only publish one page at a time.
Recently, I was updating ALL of my pages to update some of the the theming, but I didn't want to publish any of them until I had all of them updated. I was using best practices and only had one page open at a time, so we I got updating everything I had to go back in and publish each page individually.
It would be nice to have a "Publish All" choice so in cases like this, we could, well, publish all...
I could see having a dialog pop open that lists all of the pages with their last edit date and user to be able to "de-select" pages we don't want to publish.