For the most part, the ZS is rock solid, and looked at in perspective most users are just like you and me, and many more will never even see this thread.
But most here are tinkerers and are always trying to squeeze another tick of greatness out of our gear, and sometimes that leads to issues. Also, many of these pages of posts are simply brought on by incorrect setup, missed steps, or Network issues sometimes completely unrelated to the actual ZS itself.
So this thread is best viewed thru a skewed lens, as most who never have issues, will not only never look for it, but also have no need to!
Those are the many we don't hear from.
Cheers!!