If I could just jump in there as well, on the part-time teaching side, I did my research on the experiences of part-time online teachers, and many of them talked about the physical isolation, and also the fact that, in studying in a Ph.D. program, many students go in assuming they will have a position of tenure as an opportunity. Unfortunately, we know from public universities in Canada that this is not the case. Many of them were actually piecing together an income with part-time online education, which had no benefits, no pension. Although universities across the country have policies, typically, on the the maximum number of online courses someone could teach at one university, the universities are not taking into consideration—maybe they can't—the number of people and faculty who are actually teaching at multiple universities and colleges at one time, not only in Canada but also internationally. They're not making that mentorship connection with their peers or gaining the in-depth conversation that they would have one-on-one if they were physically at a university.
On February 9th, 2017. See this statement in context.