Why can't in-app recording be in wav????

Some low bitrate obscure m4a format is completely unacceptable. Look at some of your competition. Well, they all mess something up and often with in-app recording be it downmixing to mono and recording that mono signal (for some stupid reason) or using a format other than wav... DJ Player records a stereo wav file in-app. It's super convenient even though the rest of that app's interface is a kluge. What is so hard about this??