ubuntu vs mac os battery life on macbook air

Measured on a fairly simplified debian system running sway displaying a terminal. Here's my current powersave script that reduces idle power usage from 9 Watts to 7.0W. I am fine with this and ready to search, ask and make extra steps to achieve low idle power usage) (It is indeed largely eroded as I can use all the devices in the laptop even though the out-of-the-box experience is close but do not reach what macos provided about 8 years ago). On the other hand years passed and this inbalance towards macos should have been eroded. I understand that mac software and hardware is very closely tied and information on this is somewhat walled. Idle macos uses 3.2 Watts, while idle Linux uses 8-9 Watts. removing all pci (subsequently usb) devices via sysfs (except vga and host:dram).On linux these did not or marginally lower power usage: Similar measurements on a 4GB 2015 macbook air.Fan makes the same, almost inaudible noise.Tested with two version of macos: mavericks and big sur and 3 linux distros: antix, pop_os, fedora.Power usage is measured running on battery, querying the internal battery for voltage, current, and charge left.Display brightness set to barely visible with auto brightness off, screensaver off.Top and powertop shows minimal CPU and no GPU usage.I noticed when I just edit text files in vi running in terminal, the battery runs out about twice as fast on linux. Recently I switched from macos to linux on a mid 2014 8GB retina macbook pro.

Ubuntu vs mac os battery life on macbook air