I never thought much about the insides of the gas giants but it's fascinating how the phase transitions are so discrete. I suppose that's to be expected given how phase transitions work. Water to steam is a binary, not a spectrum. But the planets themselves can be put on a spectrum of rocky to gaseous based on how much solid, liquid, and gas comprise them.
My cat walked on my keyboard and submitted an empty comment, so I'm writing this instead of leaving a comment tombstone.