Comment by oooyay

I can't speak for everyone, but technologies like WireGuard, Tailscale, and Nebula are not merely VPN solutions. They're SDN solutions that incorporate VPN capabilities, WireGuard (and thus Tailscale... in most cases) being unique that they're incorporated at the kernel level. Having a single overlay network for my cloud host, home servers, cell phone, and personal computers allows me to construct my own private cloud of sorts.

Here's a visual: https://mermaid.live/edit#pako:eNptUstugzAQ_BXL5_ADHHqBSjlUJ...