Ok, I wanted to answer how to make an object flow along with a mantaflow simulation and I thought hey, cool idea: just use animation nodes.
So I created this animation node setup:
but the result was:
I don't know whether you can see it because the gif result isn't that great, but it is obvious that the location "jumps" around crazy as hell so it looks like the particle system (or better: the particles data) which come from the AN aren't keeping their index. Am I missing something or is this how it is supposed to be?