The problem with the Interplanetary Filing System, is that is is not (currently) interplanetary.
The prefix “inter” infers between - as in international (between nations). IPFS does not operate between planets, it only operates within this one, surely it should be the IntraPlanetary Filing System.
It’s called InterPlanetary because the underlying content addressing technology is designed to work when direct connections between a client and a centralized server are not feasible (e.g., between planets).
I have also read that it was chosen to highlight the ambitious scope of the project and that it, “was named in tribute to J.C.R Licklider’s vision for an “intergalactic” internet”.