Most of what's said on here is in the heat of the moment and when he finally steps down he'll get his due credit as a manager.
This is like watching your favorite boxer grow old and take one shot too many. An Ali vs Holmes moment. Wenger had his peak and those years won't come back. There has to be a change and shift in approach somewhere. Even if Wenger doesn't step down, the backroom staff need refreshing. He may still have something to offer but he'll have to hand over responsibility to other staff members. Tactics and research, training methods, scouting, player negotiations....we need to look into these areas.