GrafanaCONline 2021 Day 2 showcased significant developments in Grafana 8.0 and innovations in Prometheus and Cortex, demonstrating how these tools enhance data visualization and observability. Highlights included an in-depth look at Grafana 8.0's new features, such as updated navigation and a metrics picker for Prometheus, alongside new panels like Time series and Bar chart. The conference also presented advancements in Grafana Enterprise, including improvements in reporting and access control, and introduced a variety of plugins that expand Grafana’s capabilities beyond time series data. Notably, Robinhood shared their experience scaling from 100 million to 1 billion time series using Cortex and Grafana Enterprise Metrics, emphasizing the critical role these tools played during the surge in GameStop trades. Additionally, sessions covered the use of Prometheus and Grafana at Roblox to answer internal queries efficiently and create comprehensive dashboards, while future sessions promised insights into distributed tracing, e-commerce monitoring, and air quality predictions with Grafana.