(Might be a problem of that university, still ...)
In our department, about 20% reach a master. Sure that's more well rounded than a random bunch of courses, but it should be possible to even surpass the rigid choices of a lot of universities. I have no numbers for MOOCs at hand. If I had to guess: more like a gym: a lot of members, an order of magnitude less finishers?
I personally prefer the interaction on campus. But I dislike the outdated content of a lot of professors -- I'm not arguing about basics that are still relevant, I mean their /SoTA/ from 5-15y ago.
But MOOCs and other purely online options just didn't result in any meaningful certification especially outside of a connection to established universities. And, given that, people/companies weren't interested in paying significant bucks for them.
It was probably a useful experiment. Just not a very successful one. And once the experiment faltered, schools/professors became less interested in putting money and energy into it.
All the evidence is that most of the students/potential students who weren't already motivated to pursuing independent learning didn't really connect to all this online material.