Well that explains a lot indeed. I just assumed that the analog channels were being encoded, but evidently Comcast also encodes those channels in a separate digital stream.
Comcast would have to make significant changes their infrastructure to use better codecs.
Obviously, it makes sense to just record the MP2 stream instead of having to mess with transcoding it. And it explains why the Vegas is able to record two programs, while playing a recorded program using just a MIPS processor.
I respect your opinion. I wouldn't want to suggest that the Vegas isn't targeted towards a very viable market. I certainly appreciate what the Vegas can do for me at the cost that Comcast charges.