Does the MacBook Air throttle at 100°C?

Yes, badly. At 100°C internal temperature, any M-series MacBook Air aggressively throttles the CPU and GPU, causing frame drops, stuttery animations, and doubled or tripled compile times. It’s the fanless design hitting its thermal ceiling — sustained workloads drop to 60–70% of peak performance after a few minutes. If your workflow regularly pushes thermal limits, get a MacBook Pro with a fan instead.