add reasoning for migration to enabled localhost

docs/migrations/v7-to-v7_1.md

@@ -20,7 +20,7 @@ In the previous release of ibc-go, the localhost `v1` light client module was de
 An [automatic migration handler](https://github.com/cosmos/ibc-go/blob/09-localhost/modules/core/module.go#L133-L145) is configured in the core IBC module to set the localhost `ClientState` and sentintel `ConnectionEnd` in state.
 
 In order to use the 09-localhost client chains must update the `AllowedClients` parameter in the 02-client submodule of core IBC. This can be configured directly in the application upgrade handler or alternatively updated via the legacy governance parameter change proposal.
-We __strongly__ recommend chains to perform this action.
+We __strongly__ recommend chains to perform this action so that intra-ledger communication can be carried out using the familiar IBC interfaces.
 
 See the upgrade handler code sample provided below or [follow this link](https://github.com/cosmos/ibc-go/blob/09-localhost/testing/simapp/upgrades/upgrades.go#L85) for the upgrade handler used by the ibc-go simapp.