I see both sides.

I was an early adopter of GPS based cyclometers. I had (and still have a Garmin Forerunner ... how is THAT for ancient?

I replaced that with a VDO that told me speed, average speed, total elevation gain, distance. It's old too, but it still works, so that is what I run with.

Just this weekend it offered information of interest. I got to Red Box early and took a spin up to Mt. Wilson. It was such a beautiful morning, I seemed to really fly up there, and when I got to the top I wondered about my average speed. It was nice to see what it was. I took a different route than usual, so it was nice to see what the distance and total elevation was. When we were shivering on the descents, it was nice to know what the outside temperature was. And it is always nice to know the gradient (although I've been on those roads enough to know what they are).

A newfangled Garmin would be cool ... mostly for days where the ride has a lot of twists and turns. It beats pulling out a map every 5 minutes.

On the other hand, Disco had nothing at all on the handlebars, and that is kind of liberating too. My commuter bike has a bluetooth speaker for listening to podcasts, which I enjoy very much. Cyclometer? What the heck for? It's the same ride every day and I know the distance (although a thermometer might be nice).