What I've noticed is that the "Must Hold Mid" meta won't die because things work out that when your team wins strongly, someone at some point capped/recapped mid, and thus that validates the idea that holding it is a win condition. OR that winning without it is still currently a not-so-regular occurrence. OR because you have people that will just give up if they can't capture it early, thus guaranteeing a loss and reinforcing the idea that you must hold mid.

Again I say while mid is important, offensive pressure and making use of momentum proves to be stronger than holding a trickle source of CE that isn't even a primary winning objective.