Another issue is people don't understand how powerful modern hardware is. You have modern systems that process less transaction per a second ones from the 1970s.
Just look at the modern SPA. They are slower than ones 10 years ago, and the JavaScript VM is much faster plus all the hardware gains. Why does it make Twitter and Gmail a few seconds to load?
I don't doubt certain mainframe apps of the (late) 1970s could beat the TPS of a generically frameworked app in certain situations, but do you have any real numbers/situations/case studies to back that up?
Just look at the modern SPA. They are slower than ones 10 years ago, and the JavaScript VM is much faster plus all the hardware gains. Why does it make Twitter and Gmail a few seconds to load?