from me, almost.
WebDAV would be a nice cross-platform standards-compliant way to do this.
I’m not super hot on supporting an ever growing boat-load of proprietary sync standards. The only reason I think even WebDAV or something like that should be supported is because some poor users are stuck on operating systems that don’t give them any choice & force them into a specific platform (iOS limiting users to Apple Cloud Storage), and I barely feel bad enough for them.
Ideally, the operating systems should just make this happen. I’m using DriveSync on Android for example, and it works wonderfully to help me sync my local files with the cloud; I didn’t need Logseq to do anything, and I can also use this same tool with other applications: this is such a huge win & shows why this approach ought be preferred.