3 stages of mobs growing up!

Hello, recently I have had an idea.

What if we did not have to say goodbye to the old baby animals? what if mobs had 3 stages of development

baby (new textures) –> adolescent (old baby textures) –> adult (grown textures).

This way there is more cuteness, removal of less nostalgic textures, and more realism!

I know the drop is 3 days away but I just got this idea..