i've been using dropbox on linux on btrfs for years (since 2016), and i NEVER had any syncing issues whatsoever.
btrfs is being used more and more, and it's very sad to see Dropbox willing to drop support for btrfs.
i use dropbox daily to sync all my notes and personal files, and since i use linux for work, i can't live without any of these tools.
i agree with @ deekej, i am not going to reformat my hard drives and reinstall all my systems just because of that issue.
i would have understood dropping the support if a lot of users had syncing issues, but i haven't seen a lot of complaing relating to the syncing issues because of the filesystem.
i hope that dropbox will do the right thing, and not keep support only for ext4. that would be a very dumb decision.
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