tl;dr: Drupal VM 4.8.0 was just released, and it uses Drush 9 and Drush Launcher to usher in a new era of Drush integration!

Drush has been Drupal's stable sidekick for many years; even as Drupal core has seen major architectural changes from versions 4 to 5, 5 to 6, 6 to 7, and 7 to 8, Drush itself has continued to maintain an extremely stable core set of APIs and integrations for pretty much all the time I've been using it.

New Drush version, new Drush website!