A difficult issue with modeling individual molecular dynamics in polymeric liquids is finding a suitable level of description on which to base the model. Most linear stability analyses are performed on continuum-level models; however, we have shown in the past that at the continuum level, the timescale is so large that the individual molecule dynamics are averaged out and one only sees a generic macroscopic response. To model the effects of individual molecules, we have to operate at least at the mesoscale, so we are working on developing stochastic models for these systems. It might be possible to analyze their stability down the road by finding some suitable averaging procedure, but this is something that requires more thought and work. Thanks!