A few questions about the Syncing knowledge base documentation:

https://www.zotero.org/support/kb/repeated_conflicts

If you're correctly accepting changes but are still seeing the same conflicts over and over, you're likely receiving a sync error, which should be indicated by an error icon to the left of the sync icon in the Zotero toolbar. If a sync of an item fails due to an error, any selections you've made in its conflict resolution window won't be saved, and Zotero will display the same conflict again the next time you sync.

Is this correct for the current non-queued sync system?

https://www.zotero.org/support/kb/file_sync_errors

For intermittent file sync errors, the solution is simply to press the Sync button again or, if you're using auto-sync, to simply use Zotero normally and let it auto-sync in the background. You can hover over the blue progress bar to view file sync progress and see how many files are syncing each time.

Is this still relevant for the current sync system?

https://www.zotero.org/support/kb/files_not_syncing

(You can optionally download and open the ZIP file to confirm that it's valid, though be aware that prior to Zotero 4.0 the filenames within were encoded to work around a Firefox limitation. If the ZIP file isn't valid, delete the .zip and .prop files from the server and proceed to the following step.)

Is the "prior to Zotero 4.0..." portion still relevant, or can we remove it (considering that Zotero 4.0 was released almost 5 years ago and it's unlikely anyone has not synced their library with their WebDAV server in that time)?