I just think Keano is one of those people who once he's moved on, that's it, he's moved on. I know plenty of people who have done that with jobs, mates, even family. That's just who they are - on to the next thing.
Keane has never made it known that he is a United fanboy who'll stay around like Ole, Neville, nor is he the cheerleader kind like Beckham. He makes his unbiased opinions and shows respect.
I don't have a problem with him not playing in the testimonial. Although it's a friendly, it's a competitive one and he hasn't played in what, 4/5 years? Whatever it is. This friendly is a proper kick around with oldies - no pressure from people in their prime, no young ones blasting past you, no press gossip, just a lovely tap around.
Albeit, I would of loved to see him take on Rooney