I have a feeling that IBM, including all those pre-80 behemoths, are more like civil servants -- they always remind me of Sir Humphrey with tons of formality, planning and such. Maybe it's because they hired from academies heavily and actually did work on a lot of government projects?

Since this is the real "engineering" spirit that HNs love, I'm not going to argue. But I definitely prefer SpaceX' run and break things spirit.