Just wanted to add a little note that some way will exist to turn off the experience, it’s just not decided what yet. That said as it’s an early stage project, I would encourage everyone who hasn’t, to check out the latest version.
All feedback matters to this project. For example, making issues of things that can be actioned helps make sure all voices are heard for this project. https://github.com/WordPress/gutenberg/issues
Thank you everyone in this thread for taking time to give reviews, all do matter.