I played Man, Myth & Magic back in the day!!
Our GM loved it, and it didn't make shit for sense EXCEPT it was actually kinda cool because it was this "fantasy historical" where we FINALLY got some value out of our high school history books.
But like with all history-based RPGs I've played, the campaign didn't last long and depended entirely on having a GM and players who really enjoy history as much as they enjoy RPGs, but even then, too many sessions broke down into history knowledge dick waving...and soon we wandered back over to AD&D or something else without a shred of history.