Child care follows\xa0a familiar storyline in the U.S.: Crisis comes, people act.\xa0Then momentum fades, and\xa0the\xa0system limps\xa0ahead.\xa0What\u2019s preventing\xa0lasting reform?\xa0Advocates\xa0say many\xa0underestimate the sector\u2019s broad\xa0impacts on\xa0the\xa0economy\xa0and\xa0the\xa0future.