For a long time, I thought of observability as something mainly owned by backend, platform or site reliability teams. Frontend engineers built the interface, handled browser behavior and called APIs. When something failed deeper in the system, another team looked at server logs and infrastructure dashboards.
That division works until the application is technically available, but the user experience is not.
A page may load while its most important data arrives several seconds late. A request may succeed after multiple retries, leaving the user staring at a spinner. One cloud service may slow down while the rest of the page continues working. From an infrastructure perspective, nothing may qualify as an outage. From the user’s perspective, the application is already failing.
