Its +1 fully fulfills the first condition by itself, and its -6 is great in a deck where you want plenty of five-color creatures and self-mill
In particular with Deathrite Shaman, the presence of fetchlands in Modern and Legacy made it way too efficient at providing mana on Turn 2 whilst also breaking the colour pie since you could cast this particular mana creature with black mana
Why would we ever look back
Cards like Artificer's Assistant and Jhoira, Weatherlight Captain that care about casting historic spells wont trigger with artifact lands, while cards like Board the Weatherlight and Lost to Legend that interact with historic cards or permanents can interact with artifact lands
The tapping of the forests is really hurtful here because you arent able to squeeze any extra mana out of the forests you used to cast your creature
Have a quick discussion on who should get that copy, and at the end of the day you keep drawing cards to maintain your options