It is an interesting change of pace, and a somewhat different culture around operating system structure and package management, although definitely part of the same Unixy family.

Sadly these days the business case for using FreeBSD is weaker than ever because Linux has first-class support for Docker and Kubernetes and BSD doesn't. (No, Jails are not a good substitute because Docker is the industry standard and has a lot of third-party support and everyone wants to use it.) However, BSD is an interesting experience for hobbyists.

It's not a business proposition and its benefits are not driven by user stories.

The reason you would chose it as your platform is if you desire a clean and streamlined Unix environment and experience.

But ZFS native support comes to mind, and supposedly a kick ass network stack for very very high volumes.

And a very permissive license.

And ports software repository is nice, and pkgsrc is also nice.

If you are familiar with Linux, I don't know why you'd want to switch entirely. It might be worth using though, and becoming familiar with. It's all about your use-case. FreeBSD is a great system, and for what it's worth, my favorite aspect is the documentation. It has really comprehensive man-pages compared to Linux.