RAR archives are hugely popular in China, for both legitimate and (presumably) illegitimate reasons. All my Chinese friends constantly send me RAR files. I’ve l

RAR archives are hugely popular in China, for both legitimate and (presumably) illegitimate reasons. All my Chinese friends constantly send me RAR files. I’ve long wondered why that’s the case. All operating systems these days have built in Zip tools, but you usually have to install extra software to create and extract RAR files.