While there is an argument for multitasking in the sense of giving you multiple tasks in an iteration, that's what a backlog is for. Modern agile practices ten

While there is an argument for multitasking in the sense of giving you multiple tasks in an iteration, that's what a backlog is for. Modern agile practices tend to get this wrong by assigning you multiple items per iteration rather than use a monotask approach where you take one item all the way to completion or get blocked to then pickup another from the backlog. Kanban is the closest model to this given you can only take one sticky note back to your desk while having a "work in progress" limit per iteration. Modern scrum in my experience is a disaster because of what I described above.