The rented mainframes were, imo, far less egregious than what's awaiting all of us. It'd probably be less "massive B2B transactions to cut down on costs and outsource operating a hugely complex machine to its manufacturer", and more "everyone participating in society making mandatory perpetual payments to be allowed to use tightly-controlled devices that they must manage their entire lives through".

Imagine all buildings in New York replaced with mainframes, people living and working inside the mainframes. An Ad on every wall, every floor, internal and external. Actually it sounds kind of cool.