Google's gRPC framework offers 10x faster communication than REST using HTTP/2 and Protocol Buffers, yet remains less popular than alternatives. It provides streaming, load balancing, and authentication, but adoption faces hurdles. The core question is why a technically superior tool hasn't dominated developer workflows.

Key drawbacks include limited language support despite covering major ones, and a requirement for dedicated tooling unlike REST's native language features. gRPC's HTTP/2 dependency can block legacy systems, and its binary messages sacrifice readability for performance, complicating debugging. These trade-offs deter teams where speed isn't critical.

Despite these issues, gRPC excels for internal microservice communication where control over both ends is possible. Its streaming capabilities and built-in retries suit high-throughput scenarios. As cloud-native architectures grow, watch for better tooling and broader language support to address current adoption barriers.