If you intend to play nothing but Commander, should you really get rid of cards that can go in multiple decks, like Lightning Greaves, Three Visits, and Smothering Tithe
Great early on, but it's never that good of an idea to give your opponents extra mana
Assuming even a moderately progressed game and board state, being handed a choice between Craterhoof Behemoth, Rise of the Dark Realms, and Rivers Rebuke, knowing two of them are about to resolve, is going to leave you feeling pretty helpless
And I love flipping through the pages of those binders so much that Ive done it multiple times per week since acquiring
If cards are removed from your graveyard after that point, such as by exiling Jack-o'-Lantern from your graveyard to pay for its mana ability, this won't affect whether you can legally cast Graveyard Shift, even if that reduces the number of mana values in your graveyard to below five