That Wizards of the Coast has upheld the list in its current form for over 10 years, and before that for almost another 20, puts a lot of stock in it being something it must keep going
Four mana to clear the mana rocks, the artifact creatures, and value pieces like Rhystic Study or Smothering Tithe is great
Its a good, uncounterable commander, but it really shines in the 99 for serpent tribal decks, token multipliers like Adrix and Nev, Twincasters, and even as a clone payoff for Sakashima of a Thousand Faces and whatever green pipped partner you run
Theres mana rocks to accelerate our early game, some efficient token generators to further boost our creature count, and then a few combat-step force multipliers like Brudiclad, Telchor Engineer and Lightning Runner to push our damage potential into lethal range
Oh, and its a flipwalker