A lot has just changed (at least for me), and I don't understand how these changes are supposed to be helpful! I can't click on "Discuss sentence", anymore; if you want to report a problem, there are only 3 options, so if your is not there, that's your problem; when you hover over a word it doesn't show if it's feminine/masculine/neuter, anymore! This is VERY frustrating!
But you probably still have an activity tab and if someone posted on it and you have email notification on you apparently still get an email. The website for the new version of duo doesn't have the tab for activity or so I understand from my interpretation of what the duo software engineer posted
Activity was removed, but the tab was not. Only the new version of the Duolingo website is missing the activity tab. It's the easiest (quickest) way to tell which site version you have.
- Notice on the red header, it still says "Activity". That is the old site
- On the blue one, the "Activity" is gone, that means it's the new site.