Square was originally a single RoR monolith. We spent a decade burning it to the ground with a Java and Go microservice architecture.
Some product surface area remains Ruby, but Ruby was chased away by most teams.
Square brought in a lot of Xooglers over the years to lead the transition, so you see a lot of Google tech: protobufs, gRPCs, at one point a pre-Kubernetes Borg clone, etc.
Your claim would have more standing if 1) it made sense vs. the news and recent yearslong turn away from Ruby development, and 2) if you included any sources or information other than "nuh uh"
Some product surface area remains Ruby, but Ruby was chased away by most teams.
Square brought in a lot of Xooglers over the years to lead the transition, so you see a lot of Google tech: protobufs, gRPCs, at one point a pre-Kubernetes Borg clone, etc.