I thought <bigcorp> used <xyz> is always a funny question/assertion.

Bigcorps are large and diverse. In this case - this seems to be user/desktop facing as it's a fuse module for studio assets.

They use FreeBSD for the CDN but I think their application servers use Linux.

https://netflixtechblog.com/linux-performance-analysis-in-60...

Netflix uses FreeBSD for their dataplane and AWS Linux for control plane, at least as of ~2020.