Seven DrupalCon Rotterdam speaker groups examine production AI workflows, trusted answers, generative search, Drupal AI products, modern video delivery, HTMX, and open-source community sustainability across 28–30 September 2026. Their examples focus on observability, source quality, explicit tradeoffs, maintainable architecture, and ownership after an implementation begins working. For Drupal teams, the common question is how to recognise failure and unfinished work when the visible result already looks successful.