It's not about fast delivery, at least not in this way. Arguably if you need mTLS, traffic shaping, cross service observability, service discovery... Then yes, it's much faster to use an existing solution than built it yourself. But it won't make you hot fixes shipped faster.

Service Mesh is nothing new. People tend to call it differently back then. The key features it bring are: - Traffic shaping: mirroring, canary, blue-green... - Cross service observability - End to end encryption - Service discovery

I think it is named Blue-green deployments in the article