This is almost IPv9 (RFC1606)! https://datatracker.ietf.org/doc/html/rfc1606

   The up to 42 deep hierarchy of routing levels built into IPv9 must
   have been one of the key features for its wide deployment. [...]
   As yet, no requirement has been found for levels 40-42, with level 39
   still being used for experimental interrogation of atomic structure
   of components where required.

Of course, it's a 1st April RFC. For those who don't know them, see https://en.wikipedia.org/wiki/April_Fools'_Day_Request_for_C...: they include thinks like terminals with subliminal messages, IP over pigeons...