when should you consider a service mesh tho

hey everyone, ive been seeing a lot of talk about service meshes like Istio and Linkerd lately, especially in microservice architectures. while i understand the benefits they offer for traffic management, observability, and security, im trying to figure out the tipping point. at what scale or complexity does introducing a service mesh become more beneficial than the operational overhead it brings? im curious to hear your experiences and insights on when its the right time to adopt one.