There's one more factor which is the configuration of QoS. This can be as easy as checking a box in a GUI for home routers. I've also spent days configuring Cis

There's one more factor which is the configuration of QoS. This can be as easy as checking a box in a GUI for home routers. I've also spent days configuring Cisco switches, OpenBSD queues, VLANs, etc to achieve this.