Mention cardinality and standardization

README.md

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-Autometrics provides a [macro](https://docs.rs/autometrics/latest/autometrics/attr.autometrics.html) that makes it trivial to instrument any function with the most useful metrics: request rate, error rate, and latency.
+Autometrics provides a macro that makes it trivial to instrument any function with the most useful metrics: request rate, error rate, and latency.
 
 Autometrics then uses your function details to generate powerful Prometheus queries that help you identify and debug issues in production.
 
 It is a thin layer on top of existing Prometheus and OpenTelemetry libraries that produces standardized metrics and uses this standardization to give lots of benefits out of the box:
 
 ## Benefits
 
-- [✨ `#[autometrics]`](https://docs.rs/autometrics/latest/autometrics/attr.autometrics.html) macro instruments any function or `impl` block to add granular metrics, without you having to think about what is worth tracking
+- [✨ `#[autometrics]`](https://docs.rs/autometrics/latest/autometrics/attr.autometrics.html) macro instruments any function or `impl` block to add useful metrics, without you having to think about what is worth tracking
 - 💡 Writes Prometheus queries so you can understand your metrics without being a PromQL expert
 - 🔗 Injects links to live Prometheus charts directly into each function's doc comments
 - [🔍 Identify commits](https://docs.rs/autometrics/latest/autometrics/#identifying-faulty-commits-with-the-build_info-metric) that introduced errors or increased latency
 - [📊 Grafana dashboards](https://github.com/autometrics-dev/autometrics-shared#dashboards) work without configuration to visualize the performance of functions & [SLOs](https://docs.rs/autometrics/latest/autometrics/objectives/index.html)
+- ⚖️ Function-level metrics are granular without [exploding cardinality](https://blog.cloudflare.com/how-cloudflare-runs-prometheus-at-scale/#metrics-cardinality)
+- 📏 Standardizing metrics across services and teams improves debugging
 - [⚡ Minimal runtime overhead](#benchmarks)
 
 ## Advanced Features