Never, because it’s not. This is the future:

https://knowyourmeme.com/memes/cultures/fully-automated-luxury-gay-space-communism

Let’s get there as quickly as possible

You’re in good company. Steam even managed to do it for a whole bunch of people:

https://github.com/ValveSoftware/steam-for-linux/issues/3671

I was also curious, here’s a good answer:

https://unix.stackexchange.com/questions/670199/how-is-dev-null-implemented

The implementation is:

static ssize_t write_null(struct file *file, const char __user *buf,
              size_t count, loff_t *ppos)
{
    return count;
}