Games are already horifically inefficient
That’s so far from the truth, it hurts me to read it. Games are one of the most optimised programs you can run on your computer. Just think about it, it’s a application rendering an entire imaginary world every dozen milliseconds. Compare it to anything else you run, like say slack or teams, which makes your CPU sweat just to notify you about a new message.
As they point out at the end, this wasn’t about the old control panel, but the new settings panel. It’s all brand new code.