It is but you see less screen time instead of degraded performance. The suggestion here is that Apple is throttling the hardware via software in order to prevent reduced screen time.
Also, after 3-4 years with a laptop, you typically start to see decreased performance because of clogging of fans, degradation in the thermal paste, etc. This causes the CPU to run hotter and throttle sooner to stay inside of its thermal envelope.
Also, after 3-4 years with a laptop, you typically start to see decreased performance because of clogging of fans, degradation in the thermal paste, etc. This causes the CPU to run hotter and throttle sooner to stay inside of its thermal envelope.