Open Source Observability Day October 23, 2025 Uncovered: The Hard Truth About OTel's Vendor-Neutrality • Magical Mystery Tour: Roundup of Observability Datastores Online Open Source Observability Day Website Uncovered: The Hard Truth About OTel’s Vendor-Neutrality Link to heading Slides Magical Mystery Tour: Roundup of Observability Datastores Link to heading Slides