On the surface..
..this sounds like a horrible idea to maintain this old, probably somewhat insecure, lumbering beast of a system. And it was incredibly shortsighted and lazy to wait until the 11th hour to do this. But hearing the horror stories of other companies' transitions to SAP or even newer versions of Oracle, or to different 3rd-party providers, it may be the wisest thing they can do, at least for the moment. They'll still need to modernize everything eventually, but at least it won't be like a family trying to move apartments in the middle of the night while bombs are falling. Still, whatever management waited this long to modernize really needs a review.