Correct you are.
I’m here fresh from Bittorrent Sync 2.0 (shortly 1.4) and damn I’ve had many problems with that software. Including but not limited to loss of files due to old files overwriting new files, files not syncing and who knows what. So far I’m VERY happy with SyncThing, and will probably replace BTSync during today.
I don’t think SyncThing is competing with Boxcryptor etc. I am actually using Boxcryptor Classic 1.7 to encrypt files in my SyncThing folder to ensure that not only the transmission is encrypted, but also the endpoint storage.
This is going to be a great replacement for Dropbox, or well at least for those who have a server online 24/7.