Still using BT Sync for two cases :
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A multi terabytes share that need to sync as fast as possible over the available bandwith (last time I compared Syncthing was still way slower).
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Another share with nested shared folders (some people get the “master” share while others only get a subfolder). I remember reading that it won’t work on the BTSync forums but I tested it anyway, it worked, and it’s been working without issue for about a year. I don’t think it is advisable or even possible with Syncthing.
- BT Sync is still more user friendly than Syncthing for business use (installer, GUI out of the box -I mean not browser based GUI-, easier to setup, etc).