Using gRPC for (local) inter-process communication (2021)

> In our scenario of local IPC, some obvious tuning options exist: data is exchanged via a Unix domain socket (unix:// address) instead of a TCP socket

AFAIK at least on linux there is no difference between using a UDS and a tcp socket connected to localhost.

There's definitely differences, whether or not it matters for most usages. I've worked on several IPC mechanisms that specifically benefited from one vs. the other.