I’d like to sync my markdown notes between devices (laptop and phone), which service is better: Nextcloud or Syncthing? Any other important idea I should know?, like latency times, or maximum number of synced devices, what if I edit the same note from both places without internet and then both get connected to a network… For example, I know Nextcloud let me have a history of the notes.
Syncthing has been much more reliable for me. It syncs extremely fast, picks up changes nearly instantly, and just works so well I never really even think about it.
Nextcloud has caused outright data loss once for me (all of my data was corrupted by nextcloud and then synced to my devices, had to completely recover from a backup), and broken due to updates several other times. It’s overall very slow, and a pain to maintain through updates.
Syncthing will handle duplicates by renaming the older copy, and also has modes for versioning and deleted file recovery that you can enable and customized how you want to.