The battery and efficiency improvements came before the oled screen. But the oled switch was a monster update that improved just about every component of the build quality. It was a much bigger upgrade than the first one that doubled the switched battery life.
Mufflers that do the opposite. I love cars that run silent 99% of the time. When they only get loud and mean when you’re fully into the throttle, that’s awesome. When they sound like shit with a crazy loud drone at 2k rpm, well that’s just garbage.