Because the new process will deliver a good step forward in performance and efficiency. We will have to wait for the M3 chips to get a significant improvement. These M2 chips seem to be about a 20% CPU and 30% GPU improvement which is not going to be worth upgrading from M1 chips for the vast majority of people. M3 on a 3nm process will be worth the upgrade for more people.
True, most people don’t need any kind of specific performance at all and could probably keep a modern laptop for 10 years. The people paying attention to performance benchmarks may have more performance oriented workloads that might benefit from the 50% to 100% increase we’ll probably see from M1 to M3.
