Another Casualty.
As with most other HP acquisitions, they don't want to be another casualty. Can you blame them?
HP has the rep to ruin/run everything they touch into the ground, so probably some pride in them not just capitulating and staging themselves for burial up front.
Maybe HP will try to bring back the Cray Itanium Division in fabulous collaboration with Intel for planned obsolescence and go figure, upgrade to something less craptastic!