I guess hostels aren't popular in America but lots of them in Europe or Asia.
I know many young people chose hostels because of the price but some also because of the relaxed, informal atmosphere/easy to socialise/meet new people etc
What's your outlook/experience?
I guess if you're young and poor and want to travel the world, then there's no choice because you need to budget carefully and can't afford sleeping in hotels

Then, if you're above a certain age, then there's no choice either, since hostels are rather for young people.
but how about if you're young and make good money?
I guess most such people on GFY would chose a comfortable/luxury hotel but perhaps there are exceptions?