You are right Diki. But at the time you don't realize that the lo fi qualities and distortion characteristics are indeed desirable qualities. Like Joni sang "You don't know what you've got till it's gone".

Even though people dismiss the old Yamaha FM synths like the DX-7 because at that time they were weak at playing realistic sounds that samplers could nail much closer, when it came to non realistic sounds the expression and playability of many FM patches still can't be beat. And a little FX processing that they didn't have back then makes them shine.