Comment by jmclnx

Mainframes are king on Wall Street and any company dealing with extremely high volume of transactions. They are hardware optimized to process millions (billions?) txns per second. Nothing yet can still compete. The main language for Mainframes is COBOL.

Replacing just any failed hardware component does require downtime, that is critical for any financial business.

So he number does not surprise me.

Many companies tried to move off mainframes, but they realized the costs and risks are to great to bet their business in order to be "cool".