As someone who works in finance, I can tell you it's going to be less than a year. Although uncommon, those things sometimes reboot as part of maintenance. For

As someone who works in finance, I can tell you it's going to be less than a year. Although uncommon, those things sometimes reboot as part of maintenance. For example, we upgraded our COBOl compiler and all got an email that for like half an hour after midnight in a weekend the mainframe would be down for maintenance.