How do I know if my donor area will look bad after FUE?

Basically from what I’ve seen discussed, when people get hair transplants, they move hair from the sides/back of head to the top. This sometimes leads to scarring, so what people do is the keep the sides/back a bit longer to conceal it.  If i were to get a hair transplant would I still be able to get skinfade haircuts like this or would I be required to keep the sides/back long due to scarring or any other reason

The answer to that question is: (1) depends upon your donor density, the higher it is, the less the problem, (2) it depends upon hair thickness, the higher it is, the less the problem, (3) it depends upon how many FUE grafts were taken and transplanted and (4) it depends upon your hair length, the longer it is, the less will be the problem.