"To qualify for a supermax extension, a player has to be with the team he was on at the end of his rookie contract and entering his eighth, ninth or 10th year in the NBA."

Also, if Klay gets supermaxed, Dray can't. Warriors already supermaxed Steph and teams are only allowed 2 supermaxes per roster.

Steph - Supermax
Klay - Supermax
KD - Max
Dray - Max
Warriors - Hella taxed

But I think this will be the end game and the team will play together through 2022 or 2023 before they have to break it up.

If everyone comes back, they probably win a few more titles too because the warriors are good at developing talent.