This article leaves me confused. The “wide event” example presented is a mishmash of all the different concerns involved with a business operation: HTTP request, SQL query, business objects, caches, …. How is this any better than collecting most of this information as separate events on a technical level (with minimal, if any, code changes: interceptors, middleware etc) and then aggregating afterwards?

From my perspective, this is just structured logging. It doesn’t cover tracing and metrics, at all.

> This process requires no code changes—metric are derived directly from the raw event data through queries, eliminating the need for pre-aggregation or prior instrumentation.

“requires no code changes”? Well certainly, because by the time you send events like that your code has already bent over backwards to enable them.

Surely I must be missing something.