You've got me. Ask Todd. Nobody really
knows it's all speculation. They could have been pressed on time (could have to do with all of the audio bugs and "bloopers" that accidentally got into TES:IV), they could have not had enough money from spending it on very expensive voice actors, they could have just felt it wasn't necessary, etc. But it definitely wasn't space, and we need not worry about space in the next game since they have new audio compression methods.
I exported the child voices from Fallout 3 to see if I could re-mix them to say different things, and "Just hanging around this boring place, as usual." costs only 28KB. And it's 3.20 seconds long.
[edit] I was mistaken, they used a different quality for dialogue in OblivionJauffre talking for 5 seconds is 46KB.
That means, in comparison.
- 3.2 seconds of speaking in Fallout 3 is 28KB.
- 5 seconds of speaking in Oblivion is 46 KB.
It also has a lot to do with what quality they record dialogue at.
Anyway, Oblivion Dialogue takes up 9.2 KB per second. Fallout 3 Dialogue takes up 8.75 KB per second. While that doesn't seem like much, all of Oblivion dialogue took up exactly 1708 MB (AKA 1,748,992 KB). Under
.ogg it would have been 1624 MB (AKA 1,663,443). So 100 Megabytes of a difference. It takes approximately 171 MB for somebody to fully voice act a race (in the .wav) , and there was 655.36 MB left on the disk. With
.ogg it would have taken 162MB. They could have fit about 3.8 voices if you were just considering space on a DVD, just using .wav.
BUT keep in mind that much of the space taken up was used for members of all of the races, so the exact amount isn't there. If you used .ogg, they could have fit 4 voices. However, if there weren't rumors then none of this would be a problem and tons of space would have been saved. They also had the ability to fit in more voices than they had and could fit even more in now.
In SHORT
They had the space and didn't use it, they have even more space now, if there are no rumors and things that every single person needs to say they can have all the space they need.Also, I'd like to point out that if they make a few generic voices like the Oblivion/Fallout 3 generic voices
with rumors, and then have many characters with tons of unique dialogue and no "rumors" option, it would save tons of space, there would be tons of dialogue, and nobody would have to complain, and they could keep rumors.