TLDR I think right now the WG includes both those that have encryption as a hard requirement and those that don’t and I think as a broad discussion area it’s ok to be imprecise, especially since the E2EE messaging WG exists.
I think those folks that want an encrypted solution should also convene and coordinate and that we have room to do that here. Do you or @gdey.me want to lead that meeting?
You have good examples in iCloud! I very much aspire to end up in a iCloud like system!
The vast majority of solutions in the wild of apps (aka SaaS stuff in databases) take private to mean access control not encryption.
I also posted that I, personally, don’t think DMs are a good shared use case precisely because I think encryption is a hard requirement for that use case