What convinced WotC that the playerbase could handle Eldraine, Bloomburrow and Lorwyn in consecutive years? (I'm excited! But you've said fairytale stuff used to be a harder sell internally.)

Throne of Eldraine doing well helped reshape thoughts.

I don't understand how do you consider other great risks, like adding mechanics/cards considered difficult to balance, like affinity, but you can't handle a world filled with characters, awesome art, modern staples, take the few good mechanics and reshape it to a higher power level. You have done such a great work with the new sets, I don't see how you couldn't do the same with Kamigawa.

The mechanics of Champions of Kamigawa block ranked mechanically as one of the worst blocks of all time. Also, the creative of Champions of Kamgawa block ranked creatively as one of the worst blocks of all time. I’m not sure what we’re supposed to be saving - the mechanics that the majority of players strongly disliked or the creative that the majority of players strongly disliked.

To get a third Un-set have you tried... slaughtering everyone at WotC (and perhaps Hasbro) that outranks you and using your new-found position of power to reshape MTG as you see fit, to include an Unset every other year? I think the idea has potential, and there are a lot of upsides to consider! :-)

I do very much want a third Un-Set but I’m not so Rakdosian in my desires.