For me, the quality of this will be substantially determined by archival behaviour, as per Hiding archived and junked cards from search + command prompt.
My structure right now is:
Tasks -> Tasks 07/2020 -> <various cards>
When a task is complete, I archive it — and that’s where I need to feel comfortable making many small cards and then archiving to get them out of the way.
As things stand today, I’m hesitant to many small cards, since this can clutter the Link/Parent/global search lists.
An alternative approach might be Card versioning, since using that approach I can just keep updating a list within a single card.