The path to WordPress 5.0 has been a rough one. With community feedback around the new editor generally split and fear about such a fundamental change generally worrying the WordPress-masses.
The team behind TinyMCE looked to ease this tension with their excellent ‘Gutenberg myth-busting: 10 answers on the future of content creation in WordPress‘ post which was published in October 2017:
It is important to note that version 4.9* of WordPress is not out yet. Version 5.0 of WordPress is not due to be released until 2018, and the new editing experience is still under constant construction.
Read the full text over on the TinyMCE blog. (*version 4.9 was released November 15, 2017)