I just customized a list (elpy-modules) by unchecking a single item that I don't like; I then saved my customizations ... The custom code wrote out the current state of the elpy-modules variable, which is a list of _other_ items that I don't mind. This seems bad: if tomorrow forcer adds some new sexy feature to elpy that I want, I won't get it, because my choices are now frozen forever. Yes, I could re-rerun customize, but I feel I
shouldn't have to.