In reply to Li-An.

That's kind of the point of Gutenberg -- to beta test upcoming features. :)

Really, given that it's early in the WordPress 6.0 cycle, you should be safe activating the plugin if you've already been running 5.9. It is not too many releases ahead at this point, and I've found it to be far more stable in these past few months than before. As always, test on a staging/dev site first.