I have yet to meet a person who says that they have a good memory. In fact, we seem to accept poor memory as a natural state of being; one that gets worse as we age.
Nothing could be further from the truth.
If we developed our memories, how would our craft improve? We’d have the elements of storytelling at our fingertips. We’d recall passages in novels and ways in which other authors innovated obligatory scenes and conventions.
(We could also memorize the first lines to our favourite books and impress (or possibly annoy) our friends!)