Approaches to prep in RPGing - GMs, players, and what play is *about*

[soviet]

They aren't. It was the second part of the post (after all the emojis) that that, that part was responding to, about using PCs backstory in planning your campaign, which is unrelated to Microscope as you don't have PCs with existing backstories in that.

Fair enough, but I think the point still remains that if a particular playstyle doesn't appeal to some people, that's not a weakness of the playstyle.