The Linux 4.4 kernel series is an LTS (Long Term Support) one, which means that it will be supported with security patches and bug fixes for a few more years than the normal Linux kernel branches. Because of this, many popular GNU/Linux operating systems prefer to use it, no matter if they are following a static or rolling release model. Among these, we can mention Ubuntu 16.04 LTS (Xenial Xerus), Arch Linux, and Solus.