It's a buzz word used to make this SPK operation seem bigger than it is or can be.

There's nothing multi chain about it when the other chains don't recognize the data on their system(s). Even in this post by spk that is made clear.

What it seems they will have is DATA SILOS all scattered across external technologies and HIVE or "SPK NETWORK" merely maintaining a limited ledger.

THIS IS NOT going to demonstrate superiority of web3 or Hive.

TO BE SUPERIOR the system and structure of DATA INTERPOLATION needs to be that HIVE exists AS THE ... " Hive " that other chains connect to and INTRINSICALLY NEED in order to verify that the multi chain activity has occurred and was successfully recorded.

In other words..
SUPERIOR SYSTEM = ALL ROADS LEAVE TO HIVE
NOT SUPERIOR = HIVE RECORDS LIMITED DATA ACTIVITY .. NO OTHER CHAIN CARES.