I think so. This late career resurgence, imo, pushes him past Isiah. What he did last year with OKC was insane. I think he might get there even if they lose this series.
I know that is blasphemous because of rings culture, but it really seems like he might already be there.
I'm not a huge CP3 fan, but it's really tough to argue against his consistency and longevity. Also, I'm not 100% sure when the next CP3 will come through. He's a pretty unique PG in terms of the current NBA. He's not an insane shooter/PG like Steph and Dame, he's not the Harden/Luka insane usage rate / I'm scoring at all three levels PG... he's like an old school PG that controls the pace, gets his guys involved and can switch gears to close out a game when the pressure hits.