No, they've consistently paid penalties for not doing so, especially during the decade or so their network stack tended to implode, taking the shared filesystem

No, they've consistently paid penalties for not doing so, especially during the decade or so their network stack tended to implode, taking the shared filesystem with it. They also benefited, during those decades, from an NSA program explicitly designed to fund US HPC OEMs in order to maintain American industry leadership in the space. I think it was a good policy, but it doesn't mean that Cray was hitting home runs right up to the HPE acquisition.