This could be a problem for email programs that limit message sizes, such as Gmail or BlackBerry.
I'd say this this is a problem for programs that don't limit sizes. TFA doesn't state any numbers, but I wouldn't want my BlackBerry to try and open files with thousands of lines of redundant CSS code.
Established technology tends to persist in the face of new technology. -- G. Blaauw, one of the designers of System 360