The history books will remember the 3-peat forever. I mean, what more can you say. He has a STRONG case for GOAT futbol career now. I can't really think who else comes close. He's surpassed Cruyff. Beckenbauer, perhaps?
But, as ZZ kind of alluded to (or maybe I just inferred), it's pretty clear that RM is at a crossroads and you'd have to think a downswing is imminent. They've taken it as far as it can go with this current team. Let someone else deal with how to appease all the aging stars, or trying to make Neymar a thing, or this, or that.