If you're into programming in C, and like simplicity, you might find more likeminded people there, similar to OpenBSD. Nix is more popular among functional programmers.
Nix is for everybody; I don't do functional programming but I still use Nix for everything. If OpenBSD is simple, or C is simple, and Void is also simple, then it sounds like I should not bother trying out Void.
I've explored potential Nix usage but I found it far to complicated and documentation on production usage rather lacking.
I would rather love something that explains me how to setup Nix on Alpine Linux and then deploy Nginx + PHP 7.1 with several websites. For desktop usage I enjoy tinkering with edge and upstream releases too much to consider Nix anyway.