Too far away to predict, but somebody will. KP may be injured often, but he's also one of the few true stretch big men in the game. This offseason only one team is projected to have max space, but in 2026 several teams are. 25 million is not even 15% of the cap in 2026.
Too put it another way: When the C's gave him an extension in 2023 he was also well known as an often-injured player, he still got a 2 year extension worth 21% of the cap.
I don't know if Brad is the best example to use when talking about contract extensions. He constantly just gives the most money he is allowed to give (Tatum, Brown, White) or just massive contracts in general where nobody is competing with us (Jrue, KP). He's not Danny who mostly negotiated in the best interest of the team.
This isn't to say that Brad isn't very good at his job, but up until this point, he's been given blank checks to build the team. In the case of KP, he will be in his 30s and will have continued to prove that he is an injury risk...an injury guarantee. He's a valuable player for sure, but you can't pay a guy you for sure can't count on $30M/yr