what’s up with all of the grpc stuff? Do you use it? Y over other?

If you wonder, then probably not worth it for you. Otherwise and without having an opinion about which implementation is better, having a standard way to make your services talk together is worth it, given that you have enough services to make the additional work neglictible compared to the time it saves.

From a solopreneur / indie point of view, probably not worth it. Remember that GAFA builds software for GAFA-scale engineering.