`createTRPCProxyClient` vs `createServerSideHelpers`
I see T3 app router is using
createTRPCProxyClient for server-side helper, why? what is the difference between it and createServerSideHelpers. I'm using createServerSideHelpers right now so i was confused. According to trpc's documentation, shouldn't we use createServerSideHelpers instead since the client and the server are in the same app?