[manmal]

Hypothetical scenario: You save 50W (maybe too high, maybe not), use the machine for 10h every day, and a kWh costs you €0.40 (eg in Germany). You save €0.20 per day, €73 per year, and €365 in 5 years. Definitely a factor in areas with high electricity prices.

[sib]

I think for most power users, they probably generate significantly more than €73 in value from the computer every day (or maybe every hour), so they are probably not thinking too much about that savings.

(Of course, power savings are important in their own right for mobile / battery-operated use cases.)