We’ve migrated from a society of sentimentality and keepsakes to a society of disposal and short-term use. My children won’t see nearly as much of me as they will of my parents and those before them since most of my photos are on password-protected disk drives with high-level encryption.
It’s a hassle to continuously migrate your pictures to new devices, but continuously backing them up will ensure that they last forever.
There are also optical disks out there with a guaranteed 30-year life span, and some high-level backup systems use DVDs with protective cases that are guaranteed for 50 years. They’re available to the public, but be prepared to pay the price for archival. Disk drives are better IMO.