What was the consequence of Kepler-10c's density revealing a massive rocky structure?

It challenged existing models of planet formation based on distance alone

The confirmation that Kepler-10c was a massive rocky planet, despite its initial potential misclassification as a gas-dominated 'mini-Neptune,' forced a revision in established thinking regarding planetary accretion. Its sheer scale—being roughly 14.5 times the mass of Earth yet being overwhelmingly dense and rocky—indicated that the abundance of rock-forming material in that stellar nursery must have been far greater than previously assumed based on models relying heavily on stellar distance. This finding suggested that the old rules linking a planet's orbital location solely to its expected composition might not always hold true, as such large, dense outliers could still form.