No matter how reliable your phone is you can always have an accident, like the phone drops and breaks. A good practice, if possible, is to keep an old(er) phone

No matter how reliable your phone is you can always have an accident, like the phone drops and breaks. A good practice, if possible, is to keep an old(er) phone as a backup device and make sure you have proper/backups migration paths. P.S. As a pinephone owner I don't consider it to be a good options for a backup device. I can only hope that one day the ecosystem gets there.