If he had a few more years left on his contract, I think it would be a reasonable question as to whether he is traded next offseason. As someone pointed out earlier, his contract expires this year. I hifhly doubt anyone would give much up for him as a rental, especially seeing how he may be out the first few weeks. He is just way to valuable to be outright cut. Is he getting older? Sure. But he's a rock at de, a major locker room presence, and is on a more than reasonable contract.
That said, we've seen far worse offseason topics debated relentlessy.