My impression is that hair replacement for men is on the increase, partly because people are gradually becoming aware how good the modern generation of hair systems are, partly because they are also becoming aware of what a lottery hair transplants still are, and partly because the stigma attached to men using a bit of artificial help to look after their appearance is waning. So there are probably more guys doing it than you are conscious of. But it still isn't as widely known as perhaps it deserves to be. The majority of the population still associates male hair replacement with the old fashioned heavy thick toupee as seen on Fred Astaire or Frank Sinatra. Understandably, guys who are wearing today's ultra-lightweight ultra-realistic hair systems are not out shouting about it, so you tend to have to be 'in the know' to be aware of how far things have changed.
You can definitely get a great result from modern hair replacements. The issue with wearing tends to be the psychological aspect - will you be comfortable about wearing an artificial prosthetic, and maybe keeping it a secret? Will you be OK when at some point you gave to tell a future wife or partner, or if something happens and someone you haven't told finds out that you are wearing? Some guys are OK with these things; others are deeply uncomfortable, and for them the improvement in appearance is negated by that feeling of discomfort.
