I thought Ainge is in it for a rebuild...didn't he ship out anyone over 30? Acquiring Howard might be great, but the assets it would take to make this trade would decimate the team.
And, what a gamble he would be, e.g., he can opt out of his contract this summer, his extensive injury history, 30 years old, not always the happiest camper, offensively he can't shoot well past 5 feet from the hoop, likely would have to give up Nets picks which may help the team for the next 15 years.