That is what I do as well, some interfaces run multiple vlans. Others have only single interface. My high volume vlans have their own uplink. Other vlans like my wireless ones share an interface. Wireless clients not going to be able to use a full gig interface anyway - not a single device for sure.. Maybe as you move to AX.. But until that time with wifi 5, not really possible for a wireless client to use full gig. So yeah they can share an interface, and rare that any wifi vlan would ever talk to another wifi vlan, etc.
This is what is nice about having multiple interfaces on your router. One of the reasons went with the 4860... Lots of discrete interfaces, gives you more options. I don't really have any use for switch ports in my router ;) That is why I have switches... heheh
Now what I would love to see, would be a netgate box that has multigig interfaces - support for 802.3bz.. Love to have interfaces that can do 10/100/1000/2.5/5/10ge
Multigig switch ports be great.. This could allow for say future connection of AX APs that support say 2.5ge uplink into the router, when you don't actually have a muligig switch, etc.
