Yeah, I get that it's not insignificant but it's not just a router, it's also uploading my packets to a fast moving object around 340 miles away. I'd like for it to be less but I'd also like for Openreach to put a green cabinet near my house and give me VDSL.

To put it in context, my PC isn't on 24 hrs a day but it's almost certainly drawing at least 250W for the 9 or 10 hours it is on. It's just a cost of working from home.