One more longtime clipless rider who has never fallen related to foot retention devices. (Toe clips, PowerGrips, Clipless) Not yet, anyway.......(sound of rapping on head). Used toe clips/straps (never with cleats) for a long time, then PowerGrips for a year or two and then took up mountain-style SPD in the 90's. Have never used genuine Shimano pedals - but have used a variety of Nashbar, Performance, Wellgo, Victor pedals. Currently have mountain style platforms - with SPD on one side and plain with pins on the other side - on both my commuter and tandem recumbents. (Stoker uses double-sided SPD). My ti recumbent has Nashbar magnesium pedals (spd both sides). In spite of 'exotic' metals, its not a very lightweight bike.
Other than when stoking our tandem, my wife has consistently used toe clips or mini-clips for 40+ years.