FreedomBox
Even if these things were dead simple, I cannot see any of my non-technical friends using products like these. It is simply prohibitively complicated compared to dropbox - that "just works". I even recall a comment on here when Dropbox launched saying something like "why not configure an FTP server to do this". This is that FTP server.Also, personally, I would never host any content on-prem at my home. It is far too easy for my internet to go down, and I'd rather my personal website be under somebody else's control (say, an S3 bucket) than get physical hardware to the server hosting the bits.