I like the idea of a hybrid of client-side software that optionally uses third-party cloud storage for cross-device sync. NetNewsWire, ByWord (markdown editor

I like the idea of a hybrid of client-side software that optionally uses third-party cloud storage for cross-device sync. NetNewsWire, ByWord (markdown editor), and Scrivener are some examples. Older versions of 1Password also had this, but I don't know if it still does anymore. Some of these programs managed this better than others. NetnewsWire and 1Password seemed to just work. Byword and Scrivener had occasional sync conflicts that had to be resolved. In general, though, this seems like a nice system: if you (the user) are subscribed to cloud storage, then you get syncing without paying for an extra service. If not, you can still use the software without syncing.