Hair transplant just a short-term result?

[Bluetox]

Hi folks.

Seeing that there seems to be so much secrecy and little evidence around hair transplantation I am really in doubt that hair transplants will give patients anything more then just a short-term result.
I noticed that out of all the hair transplant pictures and results I have seen so far it's just from pre operation to maybe at most a year old pictures. I would very much like to see some results and pictures of people from before operation into atleast a few years after the operation, if those exists?

Does anyone have any links to share of such hair transplants with pictures of more then just a span of a few months?