As I've mentioned in #7816 I think it would be more intuitive if users could just set values in the Info dict using simple assignments, e.g. info['meas_date'] = None, instead of setter methods (e.g. info.set_meas_date(None)). This is consistent with values that we currently allow to be set directly, e.g. info["bads"] = [].

This would also allow us to make read-only properties for fields which users should not set manually.