The initial 20,000 price reflected hype and limited supply
Fallout would have been a good spot, but Battle of Hoover Dam and Struggle for Project Purity take the Siege template from Fate Reforged rather than March of the Machine
If you play Charmander, Charmeleon and Charizard, it's quite crucial to have those next to each other to improve the readability of the deck
In general, EDH players overrate board wipes, and their value can really depend on local metas, but putting yourself behind often isnt worth it
WB lifegain decks appreciate the extra triggers, and its also a town for synergies, so ramp decks can stabilize early and get the payoffs later
One of the most ubiquitous Magic: The Gathering cards of all time is the all-powerful Sol Ring