One of my other hobbies is sim racing. There was a website that was well known in that community called No-Grip. They had forums dedicated to every well known sim racing title. There were forums for 3d modelling, track creation, creating skins for cars, physics info, tutorials, along with thousands of files to download. Then one day No Grip ceased to exist. The owner decided that he no longer felt like dealing with the site anymore and simply pulled the plug. Everything was gone. A lot of the members that provided content and knowledge to the forums had moved on, so there was no way to recover that lost information.
Humans tend to take things for granted, but the same thing could happen here. There is a ton of creative knowledge here, but if the plug gets pulled lots of great information will be lost.