I just discovered rclone last week. I have a nice multifunction color laser printer with a scanner, and I want to use it to scan to the cloud without having to use my computer, but it's one model before they introduced that feature. It only does FTP.

Turns out rclone can present an FTP server proxy that is backed by any storage you want. I put it in a little Docker container and now I don't have to spend $400 on a new scanner.