Cyclonic Rift's effect is one-sided, which appeals greatly to players, and few effects can resist getting "bounced," seeing how indestructible, hexproof, and regeneration don't do anything against a mass bounce effect like this one
The Social Contract: Power Levels and Rule 0 Finally, it's crucial to understand that Commander is, at its core, a social format
It effectively kills off creatures that dont look like the creatures already on the table
Then you can use the -2 to steal that great artifact you've been eyeing, and you retain it for the rest of the game
While you would be hard-pressed to find a Commander deck that does not run any artifacts at all, there are numerous commanders who incentivize you to run a significant amount of artifacts due to the synergies provided by their respective commanders