Depends really. I mean he came to the UK as a young lad and now he's coming to the latter part of his career, he may just want to have experienced more of the world and try something different.
I'm not going to get upset about that. If someone I work with told me they had an opportunity to go and work in Italy for a few years doing the same job for about the same money, I wouldn't think they were mad for wanting to go and do it.
The Man U one last year was more insane for me, but then I guess it's the name on your CV there for some reason. Like no matter how shit Ferrari are, most F1 drivers wank over racing for them.