WordPress 5.0 was released December 6, 2018. Included in this new version of WordPress was a new block-based editor named Gutenberg. Originally, creating a post / page consisted mainly of typing content into a single text area with HTML options provided by TinyMCE. The new editing experience now involves adding your content using blocks. There are blocks for headings, paragraphs, images, etc. The block order can be re-arranged / re-ordered by clicking and dragging them before / after other blocks.
I have been using WordPress for many years (since version 2.0), so at first the new editing experience was strange. Being naturally resistant to change, I first researched how to disable the new editor (which is here by the way).
Ultimately, I think Gutenberg is the way forward. For the past few years, I have watched page-builder plugins grow in popularity, and many premium themes either incorporate these plugins or use their own custom page builders. Also, many WordPress alternatives also include similar capabilities.
After using Gutenberg for the past few months, I've actually grown accustomed to using the new editor. Overall I think Gutenberg is good for WordPress users. For people who do not know HTML, they can easily build better pages than before. For people that do know HTML or miss the old editing experience, there is a "Classic" block under "Formatting" section that incorporates the TinyMCE editor.