Giving all creatures haste (even if it helps your opponents) is important in not only aggro decks that want to attack, but combo decks that rely on tapping your creatures
I mentioned in my Crucible of the Spirit Dragon article that you only need to hit one out of every six bulk-level specs to be profitable
Combining it with Fastbond Not only is this an incredibly strong way to continuously play additional lands for little cost, but there are all kinds of loops you can pull off with cards like Flash In cEDH, so many games were coming down to Golos, Tireless Pilgrim Griselbrand Cheating out a Hullbreacher This is an incredibly unfun card that stifled a popular part of Commander, spiked the popularity of wheel effects, and made an outrageous number of Treasure tokens
Foundry Champion is a Boros version of this effect
With Red Purple Trafalgar Law and Enies Lobby banned, the OP07 and OP08 metas will change drastically, so players are busy practicing to get ready
Playing against ability-blocking cards like Klefki or Galarian Weezing is not a problem