Comment by TFNA

I am an actual linguist, in a subfield that requires me to continually learn new languages, and there are no social benefits. I definitely don't get out there. Once one is a man over the age of 40 or so, local people are rarely willing to talk to you at any length, you are not interesting any more (in fact, in some cultures, local people will have heightened suspicion of you). Language learning becomes more a passive endeavour with few opportunities for real-world speaking.