Please go back to Open Street Maps on iOS
I'm not sure exactly when it happened, but in the last month or so, the Strava app switched to using Apple Maps on iOS. This is bad. Apple Maps has zero off-road mapping, so Strava is now useless for mountain biking and rural gravel roads. OSM is just better all around too - better readability on the device, better coverage (at least in the US), and can be updated by users as roads and trails are updated.
Also, unless OSM has some really strange commercial licensing, it's FREE! Why did Strava switch? Please switch back. Please. Or at least give me the option to use OSM maps. Apple maps is okay for cars, but sucks for Strava.