I've been digging into Drupal's new Single Directory Components system and I'm in awe. This is a game changer for expert site builders. It's going to save me so much time writing code and make my sites much easier to manage.
It's even better if you pair it with Layout Builder or Paragraphs because then you bypass all the confusing Twig template coding you have to do to inject one block inside another.
The only drawback is that it adds one more layer of abstraction to the View Mode system, which is a vital piece to understanding the power of Drupal CMS.
I just hope it's performant because I'm going all in on a large build I'm embarking on for this year.