But I think it's devastating to developer happiness and overall productivity if you're just running as a Scrum forever and have people with literal job-titles like "Scrum Master" who (IMO) feel pressured to create as much process as possible to justify their position. The ceremonies and process are going to grate on developers long-term. IMO, the managers will have a bad long-term sense of the effort and difficulties and progress of each sprint if you're perpetually doing that.