Grafana 8.4 introduces a significant update to the Grafana Loki data source with the default activation of the full-range log volume histogram, enhancing the visualization of log line distribution over a selected time range. Previously, histograms were limited to the first 1,000 returned lines, but now users can explore a comprehensive view that adjusts time intervals automatically, though it can be disabled due to increased query load. This update facilitates detailed log analysis by allowing users to zoom without triggering new queries and to utilize parsers for extracting log levels, which can be displayed as stacked bar charts. Additionally, handling pipeline processing errors is addressed by providing strategies to skip erroneous log lines, ensuring the histogram still renders successfully. The developers encourage feedback from users to further refine this feature, emphasizing its utility and potential improvements.