Not too long into the future, e-sim might become more flexible. For example devices logged into the same Apple ID could all use the esim profile, which would be stored in iCloud and not a single physical device. In fact this feature is in the works in some countries and telecom operators. Then losing a device or crashing a device wouldn’t necessitate going to the telecom store to get a new esim issued. Just pick up a spare phone, log into your Apple ID, and you are set.