I use the occasional embed in my courses, from sources like https://scribehow.com/ and https://genially.com/. After updating to the new community experience, I discovered that SOME of my embeds load and some of them do not.

I talked to Simplero support, and was told that "the new experience does not currently support CSS code at the site level, so any JavaScript-dependent content won't display properly." In other words, SOME embeds just won't work. I can't update to the new experience if not all of my content will display!