I'm just curious. Is there even the slightest amount of evidence that he wants to leave Sacramento, that he'd consider Boston, or that Sacramento would deal him?
How is this different than praying every day for Anthony Davis? Because Sacramento is just a teeny bit stupider?
Cousins has not publicly demanded to be traded, but he's definitely publicly criticized the organization multiple times, and pretty much everyone in Sacramento wants to be traded. It's safe to assume he would not be heartbroken to leave.
There is less evidence that Sacramento would deal him. Coaches and GM's who've tried to do so have been overruled by ownership and are no longer with the organization.
I'm fairly sure that many locations, Boston included, would be favorable to him, because it's not Sacramento. He and IT seem to get along, and IT has indicated he'd love to play with Boogie again, so I think if traded to Boston he would stay here, unless it was a total disaster.