Sid's toys would be seen as breaking the worldbuilding. How do these toys get torn apart and built into a new individual with parts from multiple toys? Does each toy have multiple minds? Does each toy cease to exist and get replaced by a new individual the moment their "surgery" is complete?

How has Woody never had to deal with a child growing up? He's as old as Jessie, and Jessie's dealt with this, and Woody hasn't? If Woody's been passed down through the generations, he's still aware of the fact that children grow up, and Stinky Pete's arguments wouldn't have any effect on him--he'd assume he'd get passed down to Andy's kid. If he was in the box for decades, and Andy's his first owner, why do those decades alone not bother him?

You're telling me that the Sunnyside Daycare Center has an enormous Dreamhouse, no Barbies, and a single Ken doll? Based on kids' usual habits, there should be a minimum of twenty Barbies for every Ken.

Man who's either seen some very small mountains, or some very big houses