I guess he never saw a Juniper M40, it's literally an i686/x86 32-bit motherboard for the routine engine, glued to a chassis with linecards containing custom ASICs and optics. As I recall it was a moderate speed Pentium 2 with some average amount of RAM and a 2.5" 44pin ATA66 laptop hard drive.

Or a M20 or so on...  The entire origin of JunOS is with FreeBSD.