Sleeping dogs

Sometimes you forget those services that quietly run for months at a time in a corner of the datacenter. I am thinking of using gRPC to replace the communication layer for our micro-services. They currently use a home-grown RPC over HTTP that, while successful and simple to use for new services, is home-grown, non-streaming, and Java specific. One of our earliest micro-services handles over 2B requests per month. Perhaps I should let sleeping dogs lie....