I asked this question many years ago on a Usenet group, and the answer was along the lines of what we’re seeing is many millions of years after those orbits began, and that they all eventually flatten out due to the gravity of the other objects in orbit.
So you could have 2 objects at roughly the same orbital distance but perpendicular to one another (eg. one orbiting the star’s poles and the other around it’s equator), and over time the small amount of gravitational force they exert on one another will bring them roughly into the same plane.
Hopefully someone better versed in the topic can come along to explain it better than I can.
As much as I’d like it to be, it doesn’t have the network effect/popularity that Reddit does. It covers maybe 70-80% of my Digg+ needs, but there are many topics/subs I want that Lemmy just doesn’t have.
“Be the change you want to see” is always there: if a topic/sub doesn’t exist, you can always create it yourself. But no good deed goes unpunished, so you’re now the owner/moderator…