Tarsnap is great and secure. Not just any HN user, Colin Percival, security officer for Freebsd and a Putnam fellow. It's a very practical and well priced option.

No, it's only for UNIX like OSs and is command line only, making it impractical or putting it out of reach of many users, even those on HN. Putting it as the drop in replacement for Dropbox for backup is simply inaccurate. The services I listed are more applicable. And Percival's stature is irrelevant here.

You're the one who brought up that it's "just by a HN user", as if that was the most salient aspect of his life. And I don't think the top-level put Tarsnap forward as a drop-in replacement for Dropbox anyway.