@erindesu

I think the point of PPPoE is so the ISP can tell which packets belong to which subscriber when the medium is shared (PON, fiber-to-the-node, DSL, etc).

Although my current ISP is somehow providing me with fiber service that uses plain old DHCP and Ethernet. Which I love and cherish very much. But I'm sure it'll be PPPoE o'clock again if I ever move or if the ONT ever needs replacement.