All of that is what worried me when we traded for him. Unlike Chris Paul, KD's legacy is set since he's won championships. I always worry about trading for or signing "stars" who no longer have that championship drive. Ring chasing stars seem more driven and willing to gut it out when things get tough.
And for those who want to say KD will increase his legacy delivering the Suns a title, of course but it's not a matter of retiring without a ring and having his impact and greatness questioned or not. He's already a top 5 player from the last 15 years. Winning, or losing, as a Sun doesn't change that. He doesn't seem to care how he's viewed either so I don't see people counting him giving him a chip on his shoulder.