The formation of nanoobjects from amphiphilic block copolymers (BCPs) has been extensively studied, and a rich diversity of synthesis methods have been described to date. Generally, the distinct segments of BCPs, each possessing unique properties and intramolecular interactions, allow for the spontaneous organization into diverse structures like spherical micelles, vesicles, and rods, driven by the aim to achieve thermodynamic equilibrium. Usually the obtainable nanomorphology is described by the socalled packing parameter, a dimensionless geometric factor that offers insight into the ratio of the hydrophobic tail's volume to its length relative to the head group area. One prominent method offering control of thermodynamics over the self-assembly process of BCPs is polymer induced self-assembly (PISA). An entirely different approach is to exert kinetic control over the process, in a type of controlled nanoprecipitation of BCPs. This method offers the potential to adjust the morphology of the resulting nanoparticle without the requirement to adjust the BCP chain lengths or composition. However, precisely tuning kinetic trapping of morphologies is difficult to carry out, and only recently continuous flow techniques have emerged as a tool to control this process effectively. Still, until today the synthesis of nanoparticles from BCPs via kinetic trapping is governed by serendipity, largely limiting their use in applications despite highly promising physical properties.