In practice I usually see that when developers finish tasks early, then they don't just sit around doing nothing for the remaining 2-3 days, they pick up new ta

In practice I usually see that when developers finish tasks early, then they don't just sit around doing nothing for the remaining 2-3 days, they pick up new tasks right away. This means there's never a clean "end" to the sprint, it basically just turns into Kanban with scrum ceremonies. It's quite difficult to get an org comfortable with developers having so much downtime at the end of a sprint where they can spend those days focusing on other stuff.