Interesting of course, but it's like saying that traditionally operating systems didn't preempt , or traditionally cpus didn't do floating point.

The boot process of Linux is really quite interesting though parts of it are hideously complex.

Most interesting to me is that Linux first boots a working OS to RAM, that OS then does a second stage boot again, mounting the root disk and launching the full OS from there. And it’s possible to just not do the main root disk boot and just run Linux entirely from RAM.