Observability in 2026: Distributed Tracing Replaced Logs, and OpenTelemetry Won

The observability landscape in 2026 looks nothing like 2020. Logs are now secondary. Traces are primary. And OpenTelemetry (OTel) won the instrumentation wars so decisively that the term "vendor-neutral observability" became a redundant phrase. Here's what changed.

The Old Model: Logs as the Source of Truth

In 2020, debugging meant logs:

# The old way