Comment by barrkel

You can run it on a capable router or on a RPi, or on your NAS. It's especially useful if you want to self-host (e.g. Immich). You can use it to authenticate for ssh if you like, or simply give you an IP you can ssh to.

It's especially handy if you want a secondary way in, in case you have problems connecting using wireguard, since it supports using a relay if you're stuck in a hotel with a heavily restricted connection.

If you run DNS at home, you can even configure it to use your home DNS and route to your home subnet(s).