As a user viewing a Project with an “incomplete tasks” view (my default preference), I want to know (minimally) if there are any “complete” tasks in each section. Maybe even a count of completed tasks for that section.
I don’t want the interface cluttered with the actual “completed tasks” listed out, which is my only other option right now with the “All tasks” view. Offer the count and obfuscate the details.
Oftentimes when returning to a project after an extended period I need to get my bearings and won’t realize I can’t find what I am looking for bc the task was “completed” and is not being shown. Some indication that it’s “hidden” because of the selected view is what I desire.