That's a really interesting comparison between your MacBook and iPhone battery degradation! A 3% drop in 6 months for your M1 MacBook, especially with optimized charging and light use, does seem a little faster than expected, but it could definitely be within a normal range given individual usage patterns. It's fascinating how different devices handle battery health. Maybe you can practice some controlled drifts in
Drift Hunters to pass the time while you monitor that battery!