Oh yea, I get the push for open source. It’s why I’ve tried 3 or 4 open source apps already - I really want to get away from OneNote (I’ve been using it for about 15 years, it’s a cluttered mess). It’s a great piece of software, but it requires either OneDrive or a SharePoint server to sync to mobile devices. To sync between PCs, you just need a shared folder - the app is smart about updates all on it’s own (at least for a few people).
Eventually I’ll settle on a replacement. And then do the work of transitioning all that data…Sigh.
I kind of assumed this was a barrier. Hell, I don’t even have family using Syncthing unless I set it up for them.
Something to add that may help with the sync part (that doesn’t require effort on end users): if you self-host something, you can provide access to it via Tailscale with the Funnel option.
Tailscale is a virtual mesh network and typically requires the client on every machine. The Funnel option “funnels” public traffic into your Tailscale network via a hosted domain name provided by Tailscale.com. Since Tailscale.com exposes the entry point, then encapsulates that traffic into your network, you never have to open a port to the world.