It used to be that I could input a workout manually, if, for instance, my battery died during a workout or I forgot my watch but I still want to record my miles. Is that feature gone? I don't even see it in "classic" any more.
You can enter a manual activity on the modern Garmin Connect in at least two places. If you have an Activities widget, you can click the + symbol in the top-right corner, or you can go to the calendar page and click on a day and pick the appropriate option from the pop up.