I'm 64, and have numbness in my feet, but its an overuse injury. Back in 2014 I did a 2100+ mile hike in 5 months (Appalachian Trail). Lost the feeling in my feet. Its come back slowly. But biking in toe clips or clipless makes it worse. I use platform pedals and loose shoes, so that I can move my feet around and use different pressure points. Works fine - I've done over 2400 miles this year.
Sam