The author is not 100% right, as is always the case with this, it depends on the data you are compressing. Here is a stackexchange with some relevant experiment

The author is not 100% right, as is always the case with this, it depends on the data you are compressing. Here is a stackexchange with some relevant experiments: https://superuser.com/questions/581035/between-xz-gzip-and-bzip2-which-compression-algorithim-is-the-most-efficient https://superuser.com/questions/581035/between-xz-gzip-and-b... I believe that the biggest driver of using old-school ZIP or GZIP is the fact that everyone knows that everything can decompress these formats. And in a modern world of terabyte disks in every laptop, multicore multi-Ghz CPUs, and megabit bandwidth, it isn't worth the effort of using a format that saves an additional 20% on compressed size at the cost of someone not being able to decompress it.