I'm not sure if there's already a term for this, but the "lack of permanency" is going to be an absolutely massive problem for future genealogists.
Here's an example of how genealogy research looks in the modern day:
* Newspapers (Headlines, Obits, Engagement/Marriage announcements)
* Handwritten letters
* Census records
* Physical photographs
* [Depending on century, location, and religious denomination] Baptism records
* Family Bibles
* Military enlistment paperwork [assuming that it wasn't destroyed in a fire.]
* White & Yellow pages
Much of this physical information has been digitized, but for information that was birthed digitally is precariously susceptible to complete loss once a website goes offline, or a hard drive fails, or any other number of issues that happens to things over the centuries. War, the elements, material shortages, etc.
There's other sources, of course. A big one is first-hand accounts of the past, but even such verbal interviews should be conducted with objects or photos to help jog the interviewees memories of the event.
The majority of how personal memories are being stored are on phones, in hard drives, and other various media that are susceptible to bit rot, proprietary encryption methods, technology or social media platforms that have already gone defunct. This is a trend which is quickly increasing too. If some serious solutions aren't proposed and adopted very soon, it seems highly likely that there's basically just going to be a giant void from the late 90's to at least the 2030's.
Heck, just think about how 10 to 20 years ago, the most common way to get a PC game was on CD. Now it would be an inconvenience because very few people even have a headphone jack, let alone a CD/DVD drive.