This is true: the firm I work for at the moment just completed buying an incredibly expensive Fortran-based platform. That's despite the fact it cannot integrate with our existing products without serious work, nobody knows Fortran here, and the original developer sold it so he could retire.

So even though it makes no technical sense it bolsters a gap in the product offering, and they'll have to find consultants to limp it along every time they need something small done that would otherwise be very cheap. It's all about the balancing act.