[hatsubai]

Sometimes, it just doesn't make sense. For example, I write and maintain the Linux kernel modules for one of the largest, most popular, and most powerful land vehicles in the world. It wouldn't make sense for us to release these to the open source community because it requires specific hardware that we make, specific FPGA firmware that we interface with, and it will only work with specific software we make. So there's at least one case where it wouldn't make sense to release this, and that's not even getting into the security aspect of things.