[dorfsmay]

The real issue is that old hardware use a lot of electrical power. You can get a small Single Board Computer with at least as much computing power as those but using 20 to 30 time less electrical power, and fitting in the palm of your hand.

[mikkupikku]

It's not really a real problem for most retro computing enthusiasts; it only comes out to a couple of bucks a month in electricity, and that's assuming you leave the computer running all month.

[vbezhenar]

It's not an issue, it's just a price to pay.