[xnyanta]

If you want your devices on your LAN to have publicly routable IP addresses, by definition they need to be GUA. I think you just mis-understand what end-to-end connectivity means.

Your "WAN" is a small transit subnet between your router and your ISPs, while the "LAN" is the actual public ip space you will be assigning to your end devices.

>If an address is publicly routable, what's "LAN" about it?

Routable or not, it's LAN because it's in your network behind your router. It's just an identifier.