Cside often improves performance. Static scripts load faster through our edge caching and protocol optimization. Dynamic scripts only add 8-20ms of latency - that's less than a human eye blink. Many customers see better page load times because we optimize script delivery and block resource-heavy malicious code before it can execute.
CSP is a great base-layer for client-side security, but it cannot see script contents. Depending on your needs and risk profile, it may or may not be sufficient.
PCI DSS requires monitoring scripts for changes. CSP can only control sources, not inspect payloads, so it cannot meet PCI DSS requirements.
We fundamentally believe every individual and operation should be able to secure themselves, regardless of resources.
Because client-side security monitors an entirely different dimension of the application stack, there is no interference.