By which metric is Linux more advanced than FreeBSD? Companies like Netflix use FreeBSD because its networking stack blows Linux out of the water. Further, how about Xorg, Apache, BIND, Nginx, etc? Significant amounts of userland tools and applications are written under more liberal licenses.
FreeBSD had "containers" aka Jails, more than a decade before Linux. Linux is merely more popular than FreeBSD, and that popularity has zero influence on its quality, I'd argue it might even have a negative impact on its quality in a statistical sense, when you take into consideration all the badly maintained SoC implementations of Linux.