

When I’m traveling internationally I’m limited to 256kbps unless I buy a local sim. Sending an app without cell needed could be useful. Especially if it’s a big app like the DJI app.
Outside of that… nah. Maybe if you’re in rural Africa where cell service is spotty at best. But even there things have improved dramatically.
Not necessarily. Tailscale uses their own servers in order to do the negotiation, but once the connections are opened on both ends you should be directly connected to each other. All without port forwarding or any config on your end.
https://tailscale.com/blog/how-tailscale-works