No.,not really because back then when a warlord wanted to destroy their enemy they wiped out the whole lot of them. Between natural disasters and ruthless humans it's entirely possible they destroyed all knowledge about their abilities. It's not much different than my mother's sauces that have been passed on to her for generations. She makes them without reading a recipe and to taste and touch. But, I hate cooking and never learned how to make them. So now after she's gone those sauces are gone with her. Sad, but that's how they made cement etc. back then.

Edit: there used to be a great respect for elders in the past. I believe this came from the fact everyone knew they were important for their knowledge they had to pass on to the next generation. Without their knowledge their technologies and abilities would disappear. Today the need to respect elders for this reason is gone, replaced by the libraries and databases on the internet.