For example, if you control Arcee, Acrobatic Coupe and March of the Machines, Arcee will be a 2/2 artifact creature during your turn and a 3/3 artifact creature (because its mana value is 3) during each opponent's turn
But for Constructed, it's harder to gauge
Roots of Wisdom Again they are working these insurance policies into cards, so you get to mill, you get to return a land or elf, then if you can't (not choose not to) you get to draw instead
Commander : Even if I don't plan on using a ton of Aetherdrift cards, I've been including Muraganda Raceway in my builds
Even without going infinite, being able to untap every turn with Murkfiend Liege, Drumbellower, White Plume Adventurer or Quest for Renewal generates a ton of advantage in multiplayer Commander