As a best practice, development tools should not be deployed on production sites. Accordingly, packaged Drupal 8 stable releases will no longer contain development PHP libraries, because development code is not guaranteed to be secure or stable for production.
Nasdaq Corporate Solutions has selected Drupal 8 as the basis for its next generation Investor Relations Website Platform. About 3,000 of the largest companies in the world use Nasdaq's Corporate Solutions for their investor relations websites.
The new version includes experimental modules to place blocks on pages, edit block configuration without leaving the page, create content moderation workflows, and use date ranges. Many smaller authoring, site building, and REST improvements are included as well.