Helper cards are especially useful at Limited events, prereleases, or casual tables where someone asks, "Wait, what does this emblem/token/dungeon do again?" for the sixth time during a game
Even if my commander was the only beast in my deck, I'd still consider this if I had room for a colorless utility land
Esix, Fractal Bloom requires considerably more setup than Adrix and Nev, but the payoff can lead to some fun shenanigans
Still, this is the first time since the printing of Grist, Hunger Tide that the codification of what a Commander can be has changed, this time to reflect any card with a power & toughness box on its front half...and uh, Grist
Arahbo, Roar of the World Eminence abilities like the one on Arahbo, Roar of the World allow your commander to start providing value as early as turn 1