Thanks for the video. I’ll try to reproduce this and get it resolved.
Yes, the particle system provides several basic operations like Wind, Drag, Turbulence, Gravity, etc. More will come. The main reason for it is to have the entire simulation be able to run on the GPU. Bridging other particle systems into the sim takes a disproportionate amount of runtime.
Of course now that we have that particle system, we might as well use it for other things. It can run tens of millions of particles in real-time on current GPUs, so it’s fun to play with. At this point the functionality is focused on uses as fluid emitters, though.
One major design goal of Reactions is to make more re-use possible. In TFD you often repeat very similar setup steps before you can do your scene-specific art-direction. Instead, ideally you would just pick a pre-built template (a default or sth. built by yourself) and go directly to art-direction.
There is still more functionality coming, especially more templates for different simulation types. But more and more things are settling down. For example, most of the tags are probably not going to change much anymore.