[snappr021]

This looks very good.

Is there syntax for dependent tasks in the timeline? In other words tasks that only start once prerequisites are done.

If the date of the original tasks changes, the dependent tasks move accordingly automatically, without needing to edit a full list of dates for each dependent item.

[genezeta]

It's a timeline that tracks events and periods. It doesn't seem to have the concept of a task in any way.

[KaoruAoiShiho]

It has checklists