Why do people use WMA? How does it compare to other codecs? etc. Reply #25 – 2013-02-02 08:05:08 Again, the OP asked a simple question 'why use wma'. I present a hypothetical situation where wma pro is most beneficial. If a user uses a windows pc, a zune device, xbox or windows phone, or all of those, they can theoretically benefit from the fact that wma pro is a competitive codec. Anti microsoft sentiment doesn't belong.