CKEditor is well-known software with a big community behind it and it already has a ton of useful plugins ready to be used. It is the first and only WYSIWYG text editor to ship with Drupal 8 core. Unfortunately, the many plugins provided by the CKEditor community can't be used directly in the CKEditor that comes with Drupal 8. It is necessary to let Drupal know that we are going to add a new button to the CKEditor.
In the next few weeks, Mauricio Dinarte (dinarcon on drupal.org) will be traveling to deliver his expertise to multiple Drupal events in Europe and America. He is on a mission to continue sharing the knowledge gained from many years as an active member of the Drupal community. Over the last few years he has presented numerous sessions and full day trainings at more than 18 Drupal camp— so you may have been at one of his presentations about Drupal basic concepts, twig recipes, or D8 migrations!
Last week we were asked to disable the "threads" in the comments and display them as a plain list in one of our projects, so checking in the Comment field settings we found an option which says:
"Threading: Show comment replies in a threaded list."
Building a custom migration in Drupal 8 blog series by Tess Flynn (socketwench)