The speed advantage alone is significant, but the real edge is consistency: a bot doesn't misclick, doesn't get the wrong card (if configured properly!), and can run across multiple tabs or accounts simultaneously
TCGPlayer seller listings appear around the clock as individual sellers add inventory
On top of all of this, if this card is destroyed by battle or card effect, you can Special Summon as many monsters that were equipped to it from your GY as possible, for regaining advantage on your field against the opponent so you can have a follow-up on your next turn
It does what it says on the tin and gives all your (other) permanents hexproof
Many decks can use Night Maintenance and then use Roseanne's Research () to find the cards they put back into the deck
Spell Card Summon Over Each time a monster(s) is Special Summoned, place 1 Summon Counter on this card (max