They never should have come into the industry to begin with honestly. They did fuck all to really do anything to the Playstation long term, which was their stated goal coming into the business, and they just made the main line console business overly crowded for Nintendo and introduced a bunch of dumb behavior like making the console business about who can lose the most money. They drove Rare into being a shadow of what they used to be.
While they were doing all this the actual threat to do what they thought Sony would do with the Playstation was being done by Apple and Google (making the smartphone which would usurp Windows' OS grasp on the computing device of the future).
At this point they might as well just be a 3rd party publisher.