and don't forget they are much more expensive than regular old light bulbs.
They also last a lot longer.
If someone has an old, power-hungry computer to run a full node, that is all that is available without incurring additional costs.
And depending on their power costs, long-term it's going to cost them more to run an old computer.
Simply reduce your electricity bill by purchasing any SSD drive and you don't need your monitor running all the time.
You basically trade the hardware cost with electricity bill.
Exactly. One Bitcoin node alone is nothing, but still worth mentioning to those to whom costs are a barrier of entry, because these costs can add up to a nice sum every year when self-hosting a lot things (vide /r/homelab to get an idea).
8TB drives from Seagate now around $170-ish.
As low as $190 for a 14 TB drive during Black Friday.
Computers are actually taking only 1% of total spent electricity at home, lights are taking 12% that is much more, and most is spent for cooling and heating with almost 50% in total.
In my case computers are closer to 50%, since heating is via natural gas and good insulation etc. protects against the heat in summers.