I come from a different era. Back in the 70s and 80s every home or business computer worked differently (BBC, Aplle ][, Spectrum, Commodore, etc); at Uni we used DOS computers, a Prime mini-computer and some stuff I can't remember; My first job was also using a Prime, and DOS, and various Unix workstations running Motif or OpenWindows. Getting used to a new way of doing things on almost every computer you rocked up to was the normal state of affairs. Kids these days.....