This very hn entries is bust contradicting your statement. Also what about syncthing[1] (for recurrent/permanent sync) and croc[2] (for one time copies) ? I have used both for a number of years already. [1] https://syncthing.net/ [2] https://github.com/schollz/croc. - Source: Hacker News / 3 months ago

Some CLI alternatives if you don't need the GUI: Croc: https://github.com/schollz/croc I used to use MW but switched to croc as the single binary was easier to deploy. - Source: Hacker News / 3 months ago

Hacker usually has some kind of relay at hand: https://github.com/nwtgck/piping-server Or a NAT traversal tool: https://github.com/shawwwn/Gole Or can just manually ncat simultaneously from both sides to proper addresses and ports, probably with the help of some public STUN server. Note that if worst case combination of NATs doesn't allow direct connection, then by definition a relay is needed, hacker or... - Source: Hacker News / 4 months ago

I have gotten a lot of use out of croc. https://github.com/schollz/croc F-droid has an android app and the cli runs on Linux, Mac, and Windows. Super pain free. It's not a synchronization solution, but sends stuff pretty easily. - Source: Hacker News / 4 months ago

Check out croc, I've been using it for years, and it works pretty great too! https://github.com/schollz/croc. - Source: Hacker News / 7 months ago

You can try to use mconnect as a replacement for kdeconnect. Source: about 2 years ago

Mconnect combined with KDE Connect. Send files (or directories recursively!) in either direction easily; send clipboard text both ways, open URLs in either direction, control your mouse from your phone, sync alerts, see your battery... Source: over 2 years ago

You could take a look at mconnect. Already existing Vala solution which is not maintained anymore. Source: about 3 years ago