Unless you need driver support only found in newer kernels. Then you are screwed.

Do I want my hardware to work or do I want to be able to read my files?

I am a BSD user yet I think this is largely irrelevant in the scope of a NAS which is the conversation we have here. Even in the cases bleeding edge hardware support is relevant, the latest Linux LTS kernel has probably wider hardware support than the freebsd-current at any given point in time anyway.

FreeBSD is a great choice, but there is no need to invent silly reasons to justify using it.