Open source is a cornerstone of modern software development, with its popularity continuing to grow as developers increasingly rely on it to build complex software solutions. The use of open source tools has become essential for creating simple and efficient online experiences, with many cloud-native technologies being open-source projects. Big data analytics also heavily relies on open source tools such as Apache Hadoop and Apache Kafka. Observability tool proliferation has led to the need for consolidation and standardization, but modern observability is powered by vendor-agnostic and open instrumentation. Security concerns surrounding open source software are valid, but research shows that it can be just as secure as proprietary software, with tools like Brakeman and Rusty Hog helping to identify potential vulnerabilities. Transparency and openness are key aspects of open source, with many organizations embracing this approach and encouraging external contributions. The New Relic team is also committed to open sourcing their software and engaging with the community on GitHub.