In the vintage adventure game community, there are so many games we only have preserved now because the author threw them up on their personal website on a whim decades later. I wish it were easier for creators to make a simple, durable archive of their old work on the web. A place to just throw your old stuff and go "make of it what you will, I wash my hands of it." Less visible than itch.io, but still discoverable enough that archivists can find it.
I guess archive.org is the closest thing we have to that. You could always upload stuff there that isn't suitable for itch.io but you still want preserved somewhere.