What to do when your teams are not able to commit to plans even a few weeks ahead? In such cases too extensive planning might cause an extensive amount of waste and it might be reasonable to apply Kanban instead of Scrum or shorten the PI-length from 10 to 5 weeks. These are only two examples what might need to be done in order to make the Agile Release Train successful. If things do not work, extreme adaptation of SAFe might be needed.
Rolf Läderach presents you based on a case example, how much freedom SAFe actually provides to adapt to almost any condition in your organisation. Your most important tools are Agile and SAFe Values and Principles and the "the 10 critical success factors of Essential SAFe". They provide you the guardrails for the adaptations of the SAFe practices.