As a teacher, this is my concern. In order to provide an online experience as well as an in person experience requires more work. Yes, there are some instances where they will compliment each other and where you can reuse some of the material in both ways. But, it is not (and never will be) a 100% crossover, so it is likely that teachers will be developing 150%-175% of content that we would normally be producing/checking/grading for a single class. We will get better at it over time, but it is a lot more work.
Thanks for putting out a good article on what we are all facing in the fall.