This is completely missing the point of GP. You can't (unless something has changed) sync metadata without using their servers. webdav is for the data, not the metadata. If you don't personally care about privacy, fine, but that's irrelevant here.
Replicating the local Zotero folder across devices won't properly sync the metadata in the face of concurrent changes.
If I didn't care about privacy and freedom I would have just used a proprietary product to begin with. It's an incredibly disappointing situation to have dragged on like this for so many years.
"Just fork it" is dismissive and misses the point. The criticism remains valid even if the maintainers refuse to act on it for whatever reason. Even if I were to invest the time to fork the project, the criticism would _still_ remain valid as long as upstream didn't take steps to fix the problem.
Replicating the local Zotero folder across devices won't properly sync the metadata in the face of concurrent changes.
If I didn't care about privacy and freedom I would have just used a proprietary product to begin with. It's an incredibly disappointing situation to have dragged on like this for so many years.
Edit: Looks like nothing has changed. https://news.ycombinator.com/item?id=29774935