[nl]

From point (1) in the post:

> The amount of things one can customize is really large, but making all this decisions has a cost.

[chrisweekly]

I don't see how that's relevant; my comment was about the OP's assertion that completed TODOs disappear from view. In Roam, when toggling an item from TODO->DONE, the "DONE" items persist in the UI wherever you created them. (No extra decisions involved.)

[chrisweekly]

Same holds true for Obsidian, too -- marking checklist items done styles them with strikethrough, but they remain visible.