Ugh, I use Dropbox on several platforms, some NTFS, some APFS, some HFS and exFAT. The majority of my files are synced to exFAT because it's the only bloody filesystem that's officially supported across all major OS. No it doesn't support extended attributes and I don't care, 95% of my files are photos!

If Dropbox go ahead with this I'm bailing. The only reason I use a managed service like this is so I don't have to care about the technical details (filesystems etc.)