Love it!
I wrote a straight up Utopian TTRPG once in a somewhat similar style - one player's PC wakes up from a coma in a perfect future, and everyone else has as many GMCs as they want. The GMs detail scenes and answer the PC's clarifying questions in ways that don't strain credibility beyond the breaking point, through the acts and actions of GMCs around the PC (mostly the folks acting as councilors for the PC). The PC asks questions about how things are, why they're that way, and how it came to be, as well as directing their single fish out of water character's actions.
The game ends when the PC has found a way to incorporate themselves in a fulfilling way into the society, or chooses to reject it and finds a way out. Everyone wins (or loses) to the degree that they can (or can't) now chart a theoretical path from here and now to this utopian future.
Vincent Baker said it was pretty neat! That's the highest praise I think I've ever gotten for anything TTRPGesque I've made.
Anyway, diatribe aside, I enjoyed reading What If, and think it would be fun to play, in a way that challenges typical tabletop social norms. (Especially recommended if you're a bit Subby and want a way to come out about it to a prospective Dom.)