They are pretty close to updating at least one of microarchitecture or fab process every year. What they aren't doing is updating every part across the product

They are pretty close to updating at least one of microarchitecture or fab process every year. What they aren't doing is updating every part across the product line. It takes 4-5 distinct dies to cover the range of laptop and desktop products, and doing four new dies every year is challenging. Getting one or two new dies out as the new flagships and reusing older dies for mid range and low-end is a lot easier.