It’s all about compromises. Aside from a massive solar flare ravaging the earth or a small rabbit nibbling on the wires, there’s not much that will disturb the signal using an ethernet cable. Wifi is sensitive to other wifi and various home appliances, PLC can easily pick noises from a faulty device anywhere in your house (or your neighbor’s…) and have to reduce speed to maintain an acceptable signal/noise ratio, etc.
It’s all about compromises. Aside from a massive solar flare ravaging the earth or a small rabbit nibbling on the wires, there’s not much that will disturb the signal using an ethernet cable. Wifi is sensitive to other wifi and various home appliances, PLC can easily pick noises from a faulty device anywhere in your house (or your neighbor’s…) and have to reduce speed to maintain an acceptable signal/noise ratio, etc.