Because over the last 7 years my iPhones consistently delivered very good user experience, including migrating to the next device, which is completed in about an hour or two, and then there’s everything on the new device: apps, configuration and data.
Yep, about the only things that don't transfer (in my experience, anyway) are files in your phone's memory—the transfer is usually wireless, so it's understandable—and apps not available on the Play Store—also understandable; the apps "sync" by literally redownloading all the apps from the Play Store (which is honestly for the best; it'll download the best optimized version of the app available for your new phone as opposed to one optimized for your old phone).
Migrating to the next device is super simple and quick on Android. Samsung, as well as Google, have made that available for many years. User experience is subjective. I can't stand the UI when I have to pick up an Apple device