I am a huge huge fan of nested checklists. The interesting thing is that there aren't many apps that fundamentally work with the notion of nested checklists that are collapsible and can be re-arranged in different views.

I believe there's a unicorn startup waiting that specializes in checklists.

If you're on linux, Check out Minder, An open source mind mapping tool. It has a task list feature where you can convert sub items to tasks and it's just PERFECT for this style of task tracking.

https://i.imgur.com/7Q6QHgo.png

completed tasks are full circles, unfinished is empty circles, You can also see notes here, and folded items.

also a highly keyboard focused application. F for fold unfold, T for task set and complete.

(Not the easiest thing to search for - "minder" doesn't bring up an app, "minder app" doesn't bring up a Linux app.)