Of course there's a fair number of us here who did a lot of riding long before bike computers were available. One option from long ago was a counter with a cog on it that fastened to a fork leg and got tripped by a bolt like thing attached to a spoke. The bolt would engage the cog and increment the counter for each wheel rotation. You had to do the conversion from wheel rotations to distance in your head (or with a slide rule. no calculators back then). If you had a watch, you could then noodle out your speed.

I had one of these on my paper route! Never did I dream in 1977 that someday there would be interwebs, cell phones and computer glasses. With each passing day I become more retro-grouch.

I ride approx. 300+ miles a month; same 2.63 mile loop, same sights, sounds, time, speed, etc. Why a computer. Usually do it in 1 hour 14 minutes, 22.3 miles. Just sold my Garmin.

I... feel naked without a computer. I love knowing my HR and cadence. Rode with it on a nearly blank screen, and got bored after an hour, switched it back to normal and continued on.

Stopped using a cyclocomputer in 2002. No electronics, don't even have a cell phone.

ditto, no computers on either bike but track every ride with strava via my iPhone which i keep in my jersey pocket