He started 15 or 16 games in each of the last two seasons but did come on as a substitute in quite a few games, that to me is a bit part player. And it was only with Southampton.
People saying players can carry on playing at a high level into their mid 30s is something that i just don't see unless they were exceptional in their mid 20.
Might need him incase of injuries because of his experience? The only way to avoid this is to let players like Ferguson gain experience. He is at this stage in his career a better player than Armstrong.
He is playing in the championship now for a reason.