Scrum is fun and sometimes funny, just like your sprint plan. All statistics here are entirely fictitious and should not be taken seriously, just like your sprint plan.
2/2 No #SAFe, no #Scrum, is mandatory. You choose with the business & your team how to write the code and maintain contact and deliver working product piece by piece... You can organise that in x-amount of ways, whatever feels best for you & business & team.