@Joan23 the "Overall" rating is calculated by averaging all the star ratings given by your guests in the "Overall" category.
The only party that has ever said that 80% 5-star reviews is the same as a 4.8 star average is Airbnb.
It is not the same.
The only time 80% 5-star reviews is the same as a 4.8 star average is if all non-5-star reviews are rated 4. Otherwise, maintaining a 4.8 star average is much harder than maintaining 80% 5-star reviews.
I have not heard anyone from Airbnb saying that guests will no longer be assigning an Overall Score.
You will hear a lot of hosts suggesting alternative methods, but that is the only discussion I have heard about changing how the Overall score is assigned.
Where did you hear that the guests would no longer be assigning the "Overall" score?