Hello,
Thanks for the question about switching to WordPress 5.0. First, WordPress 5.0 is NOT a current release. If anything, it would be a really early beta. The plan for a WordPress 5.0 release will be at the end of the first quarter or beginning of the second. When version 5.0 is released, the current plan is to have Gutenberg code become an integral part of the application. This means that Gutenberg will no longer be a plugin. If you want to use it today, you can download the plugin and use it with the development of your pages or posts. WordPress does add a warning that Gutenberg should not be used in production due to the fact that it still in beta. So, my answer is, “No, you shouldn’t switch to WordPress 5.0 since the latest release is 4.94.”