When your DM is a scientist.
There's a sorcerer over here yelling something about how his grandmother wasn't a turkey.
slowly raises pitchfork
Blasphemy?
Honestly I'm not sure. I'm a cleric of the Porcelain God and there isn't anything in our dogma or scriptures about whether or not dragons used to have feathers. Not really my purview.
When we decided to remake Draconic Park, we felt it would be best to stick to the old inaccurate but iconic featherless dragons from the original.
In a setting I'm extremely slowly putting together, dragconic species are actually closely related to avian species