Classic RPC functions would never be async, since the idea behind RPC is to replace a sync local function with a sync remote function, without having to make an

Classic RPC functions would never be async, since the idea behind RPC is to replace a sync local function with a sync remote function, without having to make any changes to the calling code. "Async RPC" is a more recent idea, but still gets referred to as "RPC", so the complaints about classic RPC still get raised since the term is overloaded.