It definitely gets better once it’s all caught up.

But it’s still much harder on battery than ST when folders have changes.

It’s kind of not Foldersync’s fault, it’s really because of the protocols - it’s all connection-based, and FS has to compare each file at sync time.

Syncthing keeps an index so it knows what files have changed. Very different tools with different use-cases and approaches.

I used FS for years until I found ST, and had to do a lot more tweaking to get sync to work the way I wanted with FS. FS doesn’t have sync conditions like ST, so I had to use Macrodroid to trigger it when on WiFi, for example.

FS can be a solution, it’s just a lot more work for anything beyond basics.