when is it time for gitops

I've been seeing GitOps mentioned more and more in the context of microservices deployments. The idea of using Git as the single source of truth for infrastructure and application definitions makes a lot of sense, especially for managing many services. But when does it cross the threshold from being a nice-to-have to a necessity? Are there specific team sizes, project complexities, or operational loads where GitOps really starts to shine and solve pain points that manual or script-based deployments just can't handle effectively anymore?