Read any random single paragraph from the story and you can no longer say that. Especially the v2 with Ultrix.

I never wrote a coff parser & loader from scratch. Or a reimplimentation of scsi itself just to then write some virtual scsi hardware good enough to satisfy a kernel that was hard coded for exactly that hardware down to practically cycle counting and who knows what mystery quirks. (He does, he knows what mystery quirks, now.)