It is more commonly used for high-value singles or tournament decks
A 100-card deck is too big to mash at once
This feels like a card an opponent might run and then Ill choose to copy it with Narsets Reversal instead
While several factors account for this, perhaps the most notable is that it contains the best countermagic and card draw
Radstorm is sure to acquire enduring popularity, especially given the number of players that make use of Atraxa and other Proliferate strategies in Commander to hand out Poison Counters like candy
Yes, there's people crazy enough to fill out an entire deck with Krakens, Leviathans, Octopuses, and Serpents, slapping a commander like Thassa, God of the Sea, Slinn Voda, the Rising Deep, or (my favorite!) Arixmethes, Slumbering Isle, and then smashing face with giant sea monsters