What's the Best Mix of Oceans to Land for a Habitable Planet?

Earth is about 29% land and 71% oceans. How significant is that mix for habitability? What does it tell us about exoplanet habitability? There are very few places on Earth where life doesn’t have a foothold. Multiple factors contribute to our planet’s overall habitability: abundant liquid water, plate tectonics, bulk composition, proximity to the Sun, …