The mainframe is already modern; it's the applications and mindsets that need to catch up—and organizations are increasingly recognizing this reality, says Mark Schettenhelm, a principal product manager at BMC working on DevEx products. The 45-year mainframe veteran joins Andy Wig on IT Social Hour to explain how mainframers' mindsets influence development outcomes, how those attitudes are changing and why we're currently in a "golden age" of opportunity on the mainframe.