I don't see it. Does this lineup scare anyone in the west?
IT
Wes Matthews
Harrison Barnes/Rudy Gay
Dirk
WCS
2018 playoffs, sure. 2017, it might be worth a pummeling in the first round. And then, a year later, Dirk retires and you have A) no young 2017 rookie stud and B) no clear building block, unless you consider Barnes and WCS those types of players. And maybe they are.
I do think that's the kind of trade that would be necessary to pry away Boogie. And this also sort of illustrates the issue with making sure you keep your aging stars (ahem Kobe) - lose them for nothing, waste their last couple years of relevancy, put your team in no-man's land.