They are called Hush Arrakis Chains (HACs) now

src/cc/dapps/zmigrate.c

@@ -23,7 +23,7 @@
 #include "cJSON.c"
 
 /*
-NOTE: HUSH nor any Hush Smart Chain has any sprout outputs. This code is kept for historical and educational purposes.
+NOTE: HUSH nor any Hush Arrakis Chain has any sprout outputs. This code is kept for historical and educational purposes.
 
  z_migrate: the purpose of z_migrate is to make converting of all sprout outputs into sapling. the usage would be for the user to specify a sapling address and call z_migrate zsaddr, until it returns that there is nothing left to be done.
  

src/rpc/misc.cpp

@@ -482,7 +482,7 @@ UniValue validateaddress(const UniValue& params, bool fHelp, const CPubKey& mypk
     if (fHelp || params.size() != 1)
         throw runtime_error(
             "validateaddress \"addr\"\n"
-            "\nReturn information about the given Hush or Hush Smart Chain (HSC) address.\n"
+            "\nReturn information about the given Hush or Hush Arrakis Chain (HAC) address.\n"
             "\nArguments:\n"
             "1. \"addr\"     (string, required) The address to validate\n"
             "\nResult:\n"