I’d like to add something to this request: the ability of children to inherit custom search portals of a parent.
I added a use case in “feature requests” for ToDos which carry forward: a custom search portal in Daily Docs that searches for and displays past due rem (i.e. rem tagged unfinished AND which contain a date before the current day). This would only be convenient if the Daily Documents folder could be set up so that ALL CHILDREN of the Daily Documents contained this custom search (otherwise I’d have to add it each day).