At home I have two different Wi-Fi networks, both known to all my mobile devices. One is our internal network, password protected. The other one is an open Freifunk network. It’s nice to walk around in the village and automatically connect to other Freifunk Wi-Fi routers, instead of using expensive mobile data.
But when at home I really want my devices connected to our internal network. Makes it easy to copy files between devices, or access services only available in our internal network. Plus the native Wi-Fi connection is much faster than the Freifunk connection, which is limited by the speed of the VPN.