I can still type `backticks` in the editor, with the exact same combinations of keystrokes I used before, it's just that they render as they will on the channel, rather than showing me the backticks (and only when I type the closing backtick. GIF here: https://i.imgur.com/o3wPWN0.gif)
Triple backtick does the same, and I can easily type another triple backtick to exit the code block, same as before. It's literally identical ergonomics to the previous editor, except it's showing me the formatting I can expect.
I have to think that maybe they issued some hotfixes to the wysiwyg editor in the past 24 hours to some workspaces? Or people are just way too up in arms about something that has literally no impact other than maybe some wasted screen real estate showing formatting buttons...