You spend your picks on bombs, removal, card advantage, and mana fixing and simply overpower opponents when the games go long
The baseline of a 5 mana 4/4 trample is too inefficient and the madness cost is manageable with free outlets but makes it relatively difficult to use with things like Faithless Looting, Fauna Shaman or more expensive discard effects
Given that Goblins usually run in packs, youll often find yourself rapidly blasting past twenty Goblins with very little effort, so if you build your deck intelligently, you can flood the entire board in an instant, and nobody can stop you
Graveyards in Commander are like a second hand
Deck building isn't the focus
Vega, the Watcher Vega, the Watcher gets better the more ways you have to cast spells from exile, and with mechanics like foretell and plot and the revival of suspend in Commander, its becoming easier than ever