Students may focus on the medium not the message. Disinformation can be disseminated quickly, verification process is a problem. HTML is easy in some word processing programs. Cost of development of technology components. Courses for larger markets are done for cost efficiency.
People assign attributes to technology that are unwarranted.
Support services are not as apparent and value is not seen. A perception that adding technology will magically improve my course. Traditional DE courses may cost less, but current technology DE course costs are rising and front-end costs are an issue.