The Data Grid widget is at its most powerful when using the XPath data source type, as it allows for Search Fields, sort orders, etc. Consequently, there are many benefits when avoid using a Microflow or an Association data retrieval.
A recent client wished for a page containing a data grid accessed from various places and thus with pre-filled search fields. I’ve come across similar requirements in the past. I think it would be useful to set the default value of the search field of a data grid based on a page parameter’s attribute.