Not GP, and I can only answer for myself, but: Personally, I use it to connect my home devices as if they were always together on the same LAN, even when they'

Not GP, and I can only answer for myself, but: Personally, I use it to connect my home devices as if they were always together on the same LAN, even when they're not. E.g. Raspberry Pi, home NAS, "home" server that's actually in a different physical location, etc. All accessible anywhere at any time, even (say) from my laptop in a moving vehicle, without connections dropping even when my IP changes. It really is like magic. At work, we use it so that remote employees can access locally-hosted applications, office NAS, etc. ACLs make it easy to employ the principle of least privilege, so that having a route into the office LAN doesn't immediately mean any and every device is compromised.