Meh. As long as you have defined deliverables between grader and student, grading programming based assignments are relatively easy. Coursera has been around longer than Jupyter has been popular, after all. (And they aren't all just multiple choice.)

Being interactive is what makes it good for teaching. But there are plenty of interactive options. And for a certain class of teaching, it is not "on rails" enough such that people will have to have a ramp up period first on Jupyter before they can really get into their topic.