IPX was a rather popular internet protocol in the late 80s, it was a TCP/IP competitor and during 90s it was often present in application configurations as a equivalent of TCP/IP, usually only these 2, no other choices. It wasn't really scalable and completely lost to TCP/IP soon.
You present blockchain as a new "TCP/IP" (meaning successful technology) but it might as well be a new "IPX", left on the margins of history books after a decade of struggle. Currently nobody knows for sure.
