Also, Android doesn't exist, and doesn't work as a consumer OS?
On a more serious note, I can't really understand the claim about a big difference in power-saving between Windows and (GNU/)Linux. It's not been an issue on my (admittedly rather old) devices. One thinkpad t420s (whose battery could use a replacement, due to age) and an ageing netbook.
I never have run tests, but have heard about "bad Linux battery time" many times, so I really wonder if it's true. And if it is: is it fixable or is some almost inherent flaw?
On a more serious note, I can't really understand the claim about a big difference in power-saving between Windows and (GNU/)Linux. It's not been an issue on my (admittedly rather old) devices. One thinkpad t420s (whose battery could use a replacement, due to age) and an ageing netbook.