I figured if I wanted to help spread the word about Gutenberg Project being Merged into Core in the Spring of 2018, I'd test it out for myself.
I plan on curating news and resources for Gutenberg here.
So, instead of just pasting a Twitter URL, I had to choose a Twitter embed block to show my tweet. That's a bummer. I'd love native oEmbed support. Maybe that's already an issue on Github.