[Notes from Pinal]: In the past, I have been wrong many times, but I was man enough to accept my mistakes and correct myself. Page Life Expectancy is a very similar subject for me. In the past when I had written a blog post based on Microsoft’s white paper, I was corrected by SQL Experts immediately for my error in judgment and incorrect information. I accepted my mistakes and corrected it. I just shared this story with my good friend Tim Radney and he was very kind to give me guidance on this subject. I asked him if he can write further on this topic and help people understand this complex subject in simple words.