If you use the classic editor you have nothing to fear for now.
As you use the WordPress block editor you will be adding new blocks that meet the design needs for your website, but may forget if you’re actually using them or not.
Since the introduction of the Gutenberg editor and the use of content blocks to layout pages and posts more and more people are used to design using blocks of all kinds.
If you are already enjoying the changes that WordPress 5.8 introduced, you should keep in mind that you can optimize the loading of editor block styles.
One of the many shortcomings that the WordPress block editor still has to be able to compete with layout tools like Divi or Elementor is the ability to add animations to the different blocks of the editor. But in reality it is something easily fixable.