What would happen if brains were made of muscle instead of fat?

Our brains are made of 60% fat, that's more than half of our brains is made of fatty tissue, but what would happen if our brains were made of muscle? And when you learn things, your brain gets ripped and jacked ๐Ÿ’ช๐Ÿผ๐Ÿง 

If this was the case how jacked would your brain be rn? ๐Ÿ˜‚
What would happen if brains were made of muscle instead of fat?
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