It's not clear to me whether the grandparent is referring to self-hosting password management or file synchronisation. However, one obvious security advantage o

It's not clear to me whether the grandparent is referring to self-hosting password management or file synchronisation. However, one obvious security advantage of self-hosting is that you can use end-to-end encryption (which most cloud sync services don't support). E.g., I use Resilio Sync (formerly Bittorrent Sync) for file sync with encryption-only keys on my cloud peer. The cloud peer participates in the mesh, providing bandwidth, but if it gets hacked, no one can read the data. (Of course, I would prefer an open source solution. SyncThing does not have the right sharing model for me. So I was thrilled to hear about LibreVault on HN, which provides functionality similar to BTSync 1.x: https://librevault.com https://librevault.com)