Simic is particularly powerful in Commander, so if you run these colors and play competitively, it gives you that little bit of an edge
Since the format is naturally less competitive and you have 3 opponents (instead of 1 as you do in other formats), who you target, what creatures you remove, and who you choose to attack is a matter of choice
They're a cycle done so well that it's authentically difficult to come up with something better
Any premium people pay above 9.5
In combination with Rosie, you can immediately grow the Took into a 4/5 and likely draw a card with another Food
There is also an Irencrag Feat spell that can quickly add an extra 3 red mana to Leyline Tyrant's pool, which practically equates to a free Lightning Bolt