Earlier quoted context omitted.
This is wrong. First, the UDM is not discontinued- it's for sale right now. Second, you don't need a USG+key to do VLANs. You do need to run a Unifi controller, but you can self host that anywhere like on a RasPi or in a VM. You don't need a USG to do the tagging and routing, either... the VLANs you set in the Unifi controller will work with any router/gateway it's just not all streamlined into the controller interfa…
> you don't need a USG+key to do VLANs. You do need to run a Unifi controller Did you try? i did. The controller UI shows you a hole in the left part of the diagram and explicitly tells you "no routing control without USG"
I have several Unifi switches and a controller (running on an rpi) on my network but I use my own router. I can setup VLAN access ports and trunks all day on the switches no problem, but I can't control the layer 3 routing between those VLANs with the controller, which is what you're talking about. By setting up a gateway/network on each VLAN from my router I can control routing. It's just not as slick as having a USG where it's all controlled via the controller UI.