Tectonic plates are what makes continental drifting of continents possible on Earth. In Universe Sandbox, tectonic plates don't yet exist for any planets, not even Earth. What I suggest for developers to simulate in Universe Sandbox is tectonic plates and volcanic eruptions. Those plate movement features must be simulated for Earth and all other Solar System bodies, including randomly generated planets and custom planets created by users.
Gas giants also have volcanic eruptions and tectonic plates shifting below their immensely thick gassy atmospheres. For planets like Earth, it would be amazing to simulate tectonic plates so that continental drift progress can be seen for millions of billions of years into the future and even the past. Imaging how cool it would be to turn back the clock many millions of years to see Pangea on Earth in Universe Sandbox by simulating the time backwards.
Users must also be able to automatically create custom made tectonic plates by crushing planets together. For example, crashing a Moon sized iron ball into Earth to create a hot iron-nickel metal core.
Yeah, of course, all planets and moons have tectonic plates, volcanes from various substances and even a hot or frozen liquid core. Please add tectonic plates and volcanic eruptions in future builds of Universe Sandbox.