bit rot

in just a few years, pretty much all flash websites and flash-based content will be inaccessible on modern computers (not counting VMs or flash sandboxes) because of dying support for the rather insecure tech (adobe flash has free() issues that make it the tech of choice for ransomware delivery)

all the creative programming efforts of people who used flash in the 2000s will be forgotten

doomed by their poor choice in proprietary software

That's more like abandonware, bit rot is something completely different from what you seem to think it means.