It's set up for my own needs when I want to use a VPN from a weird place. Or simply to bypass artificial restrictions on traffic if I'm on amenity wifi in somebody's office, airport, hotel, etc. Since I can arbitrarily reconfigure it at will, and run multiple openvpn daemons from differnt .conf files listening on different ports with unique configurations (all relying on the same CA), I can do things like have one VPN that pushes a default route for my spouse's need to do internet things on restricted amenity wifi.
Another part of it pushes only routes to a few /24 that are my personal project servers, and the routing table on vpn clients remains otherwise unmodified. Sometimes known as a split horizon VPN.
>95% of the time I am not using it to run all my traffic through there.
It's also the gateway and pushes routing table entries to things that exist for my personal test/project/development VMs that are in private IP space, so I need to be connected to the VPN in order to talk to those.
