Yes, nothing changes about the text editor with the release of the Email Editor. Customers can control what the "root block" is for their text as Greg references above. It's totall...
New email editor will show you what Snippet is being used in the email. We will probably enhance the Email Summary Page to also show info like this in the future
No, the impact is always what I mention above. Without an HTML element to act on, some of the formatting will not work. It's important to understand exactly what that setting does....
We've done extensive evaluations of what we would build and how. Right now, it's not on the short term roadmap. Other features have been prioritized higher.