It must be noted that ex situ GISAXS probes the dry "collapsed" structure, water (which by EQCM, contributes significantly to swelling) is for the large part absent from the films. What is interpreted in the ex situ films as an inter-fibrillar void/domain contraction may not maintain in situ when the film is swollen with water as well as extra ions. This highlights the need for in situ/operando GISAXS for OMIECs, which is an ongoing effort.