Using the WordPress Classic Editor on New Websites

As software evolves, we can find ourselves having to adapt to new ways of doing things. There’s a learning curve involved that, while frustrating at first, becomes second nature once we have put in the requisite practice. WordPress, however, has provided us with a choice. We can adapt to the new Gutenberg block editor, or we can stick with the tried-and-true Classic editor.
Generally speaking, “legacy” solutions such as the Classic editor are often phased out rather quickly. Software developers tend to leave the old feature around just long enough for serious users to adapt and clean up any loose ends on existing projects. After that, it’s gone for good.
In the case of web design and development, that trend often means that we can squeeze some extra life out of a feature for our existing sites, while using the latest solution for new projects. But the Classic editor may be a different ball of wax.
Continuing Support
As you might have noticed, the road to get Gutenberg released with WordPress 5.0 was a bumpy one. There were a lot of ups and downs. Worst of all, an air of uncertainty left web professionals without a clear sense of how to approach both new and existing
Source: https://managewp.org/articles/18362/using-the-wordpress-classic-editor-on-new-websites

source https://williechiu40.wordpress.com/2019/02/07/using-the-wordpress-classic-editor-on-new-websites/