I also do other things like edit videos, which don't back up well in git.
So I decided to solve this problem, and built a little utility called byteferret. Its a peer-to-peer sync utility, using syncthing under the hood, and has done a great job at syncing folders between my computers.
You can check it out and use it for free. It works on linux and mac.
Let me know what you think, either here or on X.com/gevious
Do you have any plans to offer some kind of web sync?