> Yet the market has figured out that most consumers prefer all-in-one devices. Expecting households to run dedicated firewalls besides their AiO wifi-routers is ludicrous.

Except the ER7212PC, nor anything else under the Omada (sub-)brand, is not a consumer / household device. The tagline of Omada is "Networks Empower Business":

* https://www.omadanetworks.com

If you want to haul your boat buy an F-150 pickup and don't complain that your Golf doesn't have enough towing capacity: buy the tool that you need for the problem/job you have. If you want an all-in-one then buy an AiO and not a router.

>> And no, I'm not being pedantic

> You very much are.

Expecting a router to not-route IPv6 is the unreasonable thought.