Is Norwood 3 + actually the end?

[Dav7]

Are hair transplants that can restore an original NW1 hairline still possible after you go out beyond a NW3, or can even a NW7 get a hair transplant to restore a NW1 hairline? You will have to forgive me for my complete lack of knowledge, I am still not very familiar with hair loss treatments.

Also do any combinations of medications, creams etc. maintain hair after a transplant, or are MPB sufferers ultimately doomed to their faith of continuing balding as they age?