Sure, as long as you create a timeline where the narrative tells a story involving also these kind of cultural changes, such as a book approved by WoTC etc. etc. What I mean is if you wanna make changes in official source then at least make it with a background narration. Otherwise, the changes you make become baseless. I mean saying "hey drows look like this now and it is because we like to make it and we don't make a story behind our choice to fit in the game narrative" means some changes you make in the game universe needs more work. I mean it is just lazy writing expecting the audience to accept whatever you make without building a narrative network of reasoning.
That's not how D&D has ever worked. They develop the game. People play it and develop their own details. You expect them t literally write up every detail of lore for over 100 years?
