NetworkView how to be?

As far as I know now, two systems multiplayer
NetworkView - old

will there be an old system ever? or will soon withdraw?

what about the message (NetworkView RPC functions are deprecated. Refer to the new Multiplayer Networking system)

How to fix it? swears on line [RPC]
what to replace [RPC] that there was a mistake?

or need to necessarily move to a new system of multiplayer?

How to do Commands/RPCs/RemoteActions on non-player objects?