Currently, when parsing dates in the prepare recipe, by default, the column remains a string. However, it's very rare I'll actually want to keep using a string type. It can be really time consuming to manually change the types of the parsed columns to dates one-by-one, and it's easy to forget this step, resulting in downstream datasets often having the wrong type. Ideally, the date parse processor will make date the default output type, as dates can easily be converted back to strings again with the date format processor if the user desires. Or, if at least the output type were an option selectable in the processor settings, that would still help a lot.