Ask HN: Best Wunderlist replacement?

Todoist.com is a great alternative. You can make it as complex and as simple as you want. - Each action item has a comment / notes section. You can assign labels, priorities and due dates to action items. And you can move them to project folders. Projects (or project folders) can be nested. The nested project folder structure is on the left hand side. In the paid version you can assign todos to others. Then there are filters (a standard set of filters and user defined filters) that allow you to filter your todos according to labels, assignees, due dates etc

I find https://todo.microsoft.com/ to be an excellent alternative.

Have you tried Asana?