Nothing to do with wireless, but all about hiding traffic from provider or others on the WAN side, i.e. a lot depends on how much trust you have in the VPN provider and with DEAct changes on the way the prediction is that more will be doing this
Yep sorry I was not understanding the use-case initially.
For typical usage I cannot see routing everything via a VPN to be a great solution, plenty of streaming providers now blacklist common VPNs etc.
It has never crossed my mind that end users would want to route all their traffic over a VPN at a router level, always felt like a business use case scenario where they have VPNs established over MPLS links to connect multiple offices / sites.
For privacy, typically I have seen users navigate over TOR and have a client specific VPN, but never seen this setup. Interesting though, is likely common in other countries where things are much more censored.
To answer the OPs question though, all of this is not supported by the mainstream ISP routers out of the box.