After having reviewed and investigated a number of different aspects of primitive and modern LLPS, a clear question that remains to be answered is: What is the relevance of primitive LLPS to modern cells? In particular, one major difference between LLPS and modern cells is the existence of a lipid bilayer membrane, which offers stability to modern cells and sustains a complex, out-of-equilibrium chemical network inside the cells, while simultaneously preventing the dilution of its contents to the surrounding environment, among other life-sustaining functions. Such functions are crucial to cell survivability, and thus it is likely that such a membrane is a prerequisite of biology. So, perhaps membraneless primitive LLPS eventually acquired a membrane at some point in the history of evolution?