You met Fred.

I have one who lives somewhere near me. Dude with white hair, looks about 70, rides a 90s -ish Schwinn MTB, in jeans and topsiders; goes by my house almost every day. I see him all over the place, he probably does about 2-3 hours and about 30- miles a day based on where and when I’ve seen him.
When he’s in my neighborhood, he’s doing about 18-19 mph, and looks like he’s hardly working.