Some syncthing nodes could host only the encrypted data, without the keys to decrypt them. This adds the benefit of having some nodes host the data, without being able to access it. Think: VPS, etc. that have very good availability track record, but some doubts about whether your hosting company can spy/might be coerced into spying.
Exactly. If I could be sure that the VPS couldn't read or mess with my files without me knowing, I'd definitely add a SyncThing node on my VPS and have increased availability along with security without any hassle.
Some syncthing nodes could host only the encrypted data, without the keys to decrypt them. This adds the benefit of having some nodes host the data, without being able to access it. Think: VPS, etc. that have very good availability track record, but some doubts about whether your hosting company can spy/might be coerced into spying.