Why is .lzh format still popular with japs?

The rest of the world uses .zip and .rar and these retards still seem to use .lzh a lot.

It's not because the format itself was constructed by a "fellow" Jap is it?

>>14
http://en.wikipedia.org/wiki/Tar_(file_format)#File_format_details

7z is nice because it's both fast and has good compression. Also, the program itself integrates nicely into Windows, and there's a command line version. Please explain how it is a "major PITA".