It's the kobayashi maru: if they don't update the rules, people will ignore the 24 update. If they do update the rules, people will complain it's no longer compatible. If they say the old rules are compatible, people will complain it's not 100% compatible and it invalidates the old stuff. If they say it's a brand new start, people will complain that it's a cash grab and they want to resell you an entire edition's worth of stuff again. And if WotC hadn't announced a refresh, people would complain WotC isn't updating the game and it was getting stale.