The initial fear of Stoneforge Mystic homogenizing the format, making any deck whether tempo, midrange or control a Stoneforge Mystic deck has not come true, and the Kor Artificier rather looks for specific deck building in which it naturally slides in than being an auto include in anything which can splash white

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In Vintage, where Wasteland is legal but the Moxes make it less defining than it is in Legacy, Wrenn and Six isnt the strongest planeswalker, and I think that honor either goes to Karn, the Great Creator
Hardest to evaluate white common in OTJ for Limited In general, mount creatures seem to be a bit unintuitive to me
Its just so much lovely value, from the double loot on ETB to the card advantage eternalizing it offers