In the immediate future, the screenshot archive becomes unmanageable.

In the long term future, it becomes the modern equivalent of what your parents and grandparents got out of keeping a scrapbook or photo album.

I’ve been chronically online since 1997. Going through a scrap folder which I held onto when decommissioning an old PC or phone brings back all kinds of memories. I even find that noting the changes in my meme taste can be really useful for identifying points where I’ve grown as a person. That, in turn, leads to reprocessing old memories and identifying ways in which I brought something to the table which facilitated some of my own bad experiences. That helps me heal.