We tried porting liquidfun (just a quick port with no optimizations) and the results are quite encouraging.
Have a look at these example videos
We are getting 60 fps with approx 5000 particles on 4 year old core i3 laptop, which I think is quite descent.
But porting liquid fun required few changes in Transform, World, Vector2 and raycasting callbacks(other classes remain intact). Obviously it is not yet ready to be released with this version of simphy, it will need huge framework changes in simphy, so hoping it to be released in next major release.