We can enforce regions for app create with REGIONS_REQUIRE...flag (similar to district) but how can we say don't use regions anywhere? REGIONS_REQUIRE_FOR_APP_CREATE = false doesn't say don't use regions, it just says region is not mandatory but we will give region node if it is available over non-region nodes. REGIONS_ENABLED=false means always pick non-region nodes even if you find region nodes. If you think this case will not be useful then I'm happy to get rid of this param