Consider it another way.

From the recent poll, a good deal of the people on this forum had systems with RRPs over £10k.  For many, a regular upgrade is not uncommon (certainly so if you're name starts with Mer and ends in Lin).

Even if the system used 100% of the electricity usage in a house, do you really think many of us would give a stuff?  Just think of the ratio of electricity costs vs the cost of the system and software running on it.

Valve or turntable users, probably spend more a year (on average) on valves and cartridges.