Related:

• TSO may be slow but it sure is hard to use.
• IBM: It may be slow, but at least it's expensive.
• MVS may be slow... but you sure need to know a lot to use it.
• Programmers used to batch environments may find it hard to live without giant listing
  we would find it hard to use them. -- D. M. Ritchie...
• Powerful - Hard to learn, dangerous to use.
• IBM: /I-B-M/ Inferior But Marketable; It's Better Manually
  Insidious Black Magic; It's Been Malfunctioning...
• IBM: Standards proposing organization. IBM develops hardware architectures, and builds slow underpowered prototypes for other companies to improve upon.
  See Clone....
• Use soft words and hard arguments. -- English Proverb