1) I cannot give an exact answer. At the moment, distance learning is a very convenient and affordable means of learning. But I think that this type of learning cannot be a permanent way of learning. In the case of languages, face-to-face practice with native speakers is always required, since this type of training can provide deeper knowledge in the field
2) I believe that cultural differences can be overcome. Learning through the Internet, people learn the life and culture of other countries and peoples. This can happen through watching a video, learning about the history of an object, etc. That is, digital learning gives people many opportunities and erases barriers between people.
3) Discipline plays an important role in digital learning. You can develop your self-motivation by rewarding yourself. You need to set yourself a goal and gradually achieve it.