Solitude Control decks wont want to evoke Solitude
Decks with cards like The Rack and Ensnaring Bridge are always on the edge of playability, and black-based decks in EDH have plenty of ways to punish people by making them discard
Middle-earth has such a specific geography, and it is of course one of the genius details of storytelling that influenced a lot of subsequent works in fantasy and science fiction
When you limit players to just one noncreature spell per turn, it throws a wrench in the plans of decks like Storm, Living End, or even niche decks like Jeskai Ascendancy
If you don't have six or more permanent cards in your graveyard at that time, the ability won't resolve and none of its effects will happen
Maybe you and your EDH playgroup want to find a nice set of balanced decks to play against each other or maybe youve seen some Commander 2016 precons advertised on Amazon and youre looking to snag a deck of cards for a good price