I'm not claiming that hot-plug is better, but that hot-plug is the status quo of the kernel. Modern here means that it integrates well with a modern linux kernel.

Also grouping processes together and isolating them is not really new but a proven technology (FreeBSD jails, virtualization). It's also pretty hard to argue against that the knowledge about security of unix systems didn't increase.

The irony about the fallacies is that just throwing them around even without writing a sentence goes against the very nature they were conceived in. The corresponding counter-question would be: "Why is modernity here something good?", but that question is already answered in the post to begin with.