All that being said, I don't know why studios don't just go LPCM everywhere? Why even bother with DTS-HD MA or TrueHD? Same end results and with the storage capacity of BD it's not like space is an issue...
Storage capacity is only part of the issue. The bigger factor is the maximum allowed bitrate of a BD is 36 megabit/sec. A 7.1, 48 kHz, 24-bit PCM track takes over 9 Mbps by itself. Adding multiple languages would quickly use up all the available bandwidth, leaving nothing for the video or subtitle tracks. Dolby's and DTS's lossless compression can easily achieve a 25% reduction, and routinely exceed 50%.
