> We're in the midst of launching a multi-year, billion dollar program to replace that mainframe. We've been talking about doing this for years and are just now pulling the trigger on it. There's still time to tell whether we actually go through with it or not, or get $100 million into the project and realize we're looking at a $1.5 billion - $2 billion effort and abandon the project.

I work at a company that basically built its current business on mainframes in the 70s/80s/90s. The migration effort to get off them has been going on for more than 20 years and still isn't done yet.