My humble understanding is that FUT when done properly can save a decent amount of donor grafts which can be utilised in future transplants if needed.
This is a huge bonus to those who are susceptible for more hair loss in the future.
Additionally, a skilled Surgeon will be able to minimise the scar to a good level. However, this sometimes relies on the patients genetics.
In my humble opinion, FUT still has an great advantages to this day and age if done with the proper hands