I have studied in Germany this included some online curses.
From my experience studying online will be harder for a non-small degree of students. (Through for some it's easier as they anyway don't show up for curses and do anything from home "ad-hock".)
I believ that for courses which are mainly frontal putting this part online will be majorly helpful (e.g. a reading in front of a large publicum with close to no questions from the publicum).
But especially during a CS master many curses are smaller and with a lot of student professor interactions. This translates not so well to online, even with video conferences. And that is assuming that students do have a easy to access internet connection which is good enough to do a ~20 people conference.
So while I hope for a lot of improvements by putting parts of the studium online I also hope it will be just part of it.
Lastly in-person studium creates a social environment (similar to in-person work) having online only studies/work would have _major_ health risks for a non small amount of people (such which e.g. are already somewhat depressive, have problems creating social connections, have a weak social net, lost most of their friends due to problems in their school years etc.). I have meat at least one person who would not unlikely already have committed suicide in a "online only" world...