As your infrastructure is scaling and you start to get more traffic, it’s important to make sure everything works as expected. However, as the world of infrastructure has gotten more modern, and organizations are using tools like Kubernetes, it’s important to have a modern toolset as well.
However, it’s also important to mention that sidecars are just one of many ways to improve traffic capture.
API Gateways/Ingress controllers can possibly be a good way of capturing traffic, as it’s very common for gateways and controllers to log the traffic going through. If traffic capture truly becomes commoditized, it’s then simply a matter of importing the traffic into your load-testing tool.