Why are companies moving away from Uncompressed PCM

[Canada]

I have noticed a lot recently that studios have been moving away from Uncompressed PCM. I know it takes up a hell of a lot more room than DD True HD, or DTS MA. I am not blind to that fact. To me Uncompressed PCM sounds a lot better than lossless codecs. I would rather have better audio than more special features, that's just me. I know it may cost a little more money but they could add a second disk like they did on the Pirates movies if they want to add more special features.

For people who say uncompressed PCM takes up to much space on a disk look at this. Lost: S3 has 5 eps per disc at about 45 minutes each so 225 minutes (3hrs 45 minutes) of gorgeous video and Uncompressed PCM as well. And Hellboy had 3 Uncompressed PCM tracks.

With the new video codecs like avc, and VC1 companies should put a original audio language PCM track on the disks.