In this blog post, I experiment with importing an existing Drupal 8 site configuration into a new site. Disclaimer: the steps in this tutorial are not recommend for a live site and are experimental!
In Drupal 8, there's templates for just about anything and with Drupal 8's new theme hooks, you can really narrow in on crafting a custom template for your specific use case. This makes getting at and altering markup far more accessible than it was in Drupal 6 and 7.
My uncle used to say, "You have to use the right tool for the job." This is no different when it comes to Drupal 8 theming and development.
Now that I'm digging into Drupal 8 theming and its awesomeness, I'm discovering some really useful methods and functions. At the same time, I'm learning a lot and having fun.