At DrupalCon Global 2020, Moshe Weitzman, Senior Architect and Project Lead at Tag1, and the creator of Drush (the Drupal Command Line), presented his case for a more robust command line tool for Drupal administration.
On the surface, it may seem like code that uses Guzzle to make HTTP requests will be difficult, however thanks to Guzzle's handler and middleware APIs and Drupal's KernelTestBase, it's not that painful at all.