I also have visited old minecraft worlds i made with my friends, but I must say that bitrot is a serious issue. Once the world is corrupt or lost, you cannot look back at it like you did. This save and restore is what I have grown up with. I remember the day my Pokemon Silver savegame got erased, due to a depleting battery, for example.

People should not forget to take pictures and movies and make them physical, instead of dumping it on the internet. Having a small amount of pictures is more than enough, that make those events even more special.

I had a lot of gaming memories saved on Xfire. They stopped their service a couple years ago and all the contents and thus the strong link to memories are gone. Just like people you have had contact with online, eventually you'll loose contact and then these pictures can help you not forgetting that time...

Maybe we are making and processing so many events, that we'll get issues remembering stuff in a couple years?