However, I cant lie about the elegance in their design
If your opponent ramps into an early planeswalker, then you can finish it off using Purphoross Intervention's second ability, and if there are no blockers on the opponent's side, then use the first ability to finish them off
Being able to upgrade the deck with Terminal Agony and Necrogoyf in the last few years is notable for sure, but I think a lot of Anjes appeal could definitely be rooted in the comfort players can take in having a deck with a clear purpose and not a lot of required attention as new sets roll out
These spells are cheap and flexible, and they often trade up in mana
A second wave of similar tri-lands showed up in Khans of Tarkir, such as Nomad Outpost (taps for red, white, or black)
If this happens, the price of Equinox could absolutely skyrocket since there are so few copies available