Taking exams online is not easy, but in 2020 it will be understandable for many.
no need to go anywhere, waste time and money on the road
easier to maintain timing, a user-friendly interface can be organized
potential for cheating (pleases many students)
if the exam includes an "listening" section, you will hear more from your own speakers than in a large audience
the risk that the equipment will fail, the exam will crash, the computer will overheat, etc.
more stress from proctoring (if used)
the need to spend a long time directly in front of the computer
For me, the main advantages are:
In general, it is more comfortable than going somewhere, being in the same room with strangers (or even acquaintances, but strangers), etc.