Regular SON dynamo hubs come with a hex key skewer rather than a QR. That's not a big deal, but it's probably simpler for the other 2 riders on the household who are running these hubs to deal with a QR skewer, since it's easier for them to get a feel for a tight QR than for "8-10 Nm" on the hex key, especially using a crank brothers multitool by the side of the road.
I haven't seen any admonition not to use a QR, and I doubt they could get a QR cam to put more tension on the skewer than 10 Nm on the hex skewer would pull, but I'm not sure.
I'm wondering if the hex skewer is supposed to just be a security thing, since it requires a thief to have a 5mm hex head rather than just fingers. I'm not sure that's much in the way of security. I did get some pentagonal key skewers that would provide more security, since few people are carrying one of those around, but at present these bikes don't get out of anyone's sight.