Great simulation! When you select the "Everything at once" option, you get a sense of how busy the inner Solar System really is.
It makes me think - all of these "clouds" of orbits create meteor showers on Earth only because their orbits cross the Earth's orbit. For every "cloud orbit" which crosses the Earth's orbit, there are presumably hundreds of similar clouds whose orbits don't cross the Earth's, but I suspect we have no data for most of these other clouds, as the objects are too small to be detected from Earth.
Imagine what the "Everything at once" option would look like if we had information on these other clouds as well!
Cool visualization of meteor showers orbits
