Booting a system doesn't compose; let's not have power-on reset and bootloaders.
Everything in this paper could have been cribbed from twenty year or older Usenet postings, mailing lists and other sources. Fork has been dissected ad nausem; anyone who is anyone in the Unix-like world knows this.
Oh, and threads have perpetually been the way to go on current hardware --- every damn year since 1988 and counting.