We have many datasets with formats attached that we don't normally use. So we load them with NOFMTERR in effect.
However, this clutters up the log file with lots of notes about formats that could not be found. Surely these are not needed? Alternatively, if you don't want to break backwards consistency introduce another option like NOFMTERRNOTE which suppresses these, or add a dataset option to not load the formats for a dataset.