> I know I can also use a bike GPS or a more generic GPSr with a large screen.

Their bike computers have a long lasting battery and are helpful for data. But wow are they frustrating. Software update regularly loses the config, the interface is just so painful (laggy touch screen or confusing buttons). The mapping is hard to follow.

Not that Strava mapping on a phone is any better. Why can’t Strava put arrows on the direction of travel?