It was never popular. Only 7% of hair loss sufferers in the UK go to Minoxidil/finasteride for treatment! Transplant was top, followed by shave. Combovers were higher than minoxidil/finasteride. Hat was near the bottom. Saw this in a newspaper a while ago.
I know people are thinking how can you have a transplant without medication, but people must do. Even rooney didn't take Propecia till he began losing hair behind the transplant. Fact is, people hate life time pills. I love it as long as my body can tolerate it.
Finasteride was first marketed for BPH because Merck knew that would make more money - it did as well. For male pattern baldness the amount sold is much less.