Alex Hidalgo's session from Monitorama PDX 2024. The monitoring and observability space has moved at an extremely rapid pace over the last few years. Part of this is due to legitimate technological improvements in terms of standards, tooling, and advanced vendor solutions. But a large part of why it feels like the space is moving at such a frenetic pace is due to marketing departments and talking heads just like me. While it might feel like there is intense pressure to adopt all of the newest and most advanced concepts that fall into the category of "monitoring" or "observability", I'd like to make an argument for the continued importance of our oldest, and perhaps most important, source of telemetry: the humble log line.