Each person is different when it comes to these types of things.
Personally my memory has improved over the past 9 years of sobriety but I still have a significant amount of memory problems most from my childhood and some during adulthood. I am not certain if it is alcohol related but I strongly suspect it plays a role in the memory loss. I do think that the abuse in my childhood probably is a significant factor in not being able to remember most of it.
I hope that helps answer your question.
PS Welcome to SR. I do hope you are finding SR is as great as I do.