I can actually see this effect in my flat. I live in a fairly old building; it's been renovated and I really like it, but the location of the power plugs is the

I can actually see this effect in my flat. I live in a fairly old building; it's been renovated and I really like it, but the location of the power plugs is the same as when it was constructed (except for one room in my flat). This means each socket is located at the entry of the respective room - the result being that I have extension cords all over the place. I especially find this interesting since this means the pattern of power consumption by "normal people" must have shifted drastically in the last 60-100 years. On another note, the obvious parallels to software engineering tasks seem very interesting. This shows that ideas like YAGNI very much depend on a cost-benefit-calculation that's very dependend on variables like scale and the anticipated cost of changes.