New electrical appliances often consume significantly less energy than their predecessors, so from an environmental point of view, a new purchase is often already worthwhile. For example, an LED TV consumes less than half the energy that an older plasma TV does. And the larger the screen, the more electricity is required during operation: With twice the screen diagonal, four times as large an area is illuminated.
By the way, since spring 2021 there are new energy labels, with a tightening of the criteria. Thus, A+++ devices may now become C-class. The reason for this: Modern appliances are now so economical in terms of electricity or water consumption that the upper efficiency classes have increasingly lost their significance.