We have events with multiple entry times for the same event, with multiple fees, but currently i cannot see a way of limiting capacity without creating a new event per entry time. Having an event with multiple online registration forms where we can limit capacity by registration forms, would mean they can share not only the event, but also the fees.
I used to be able to set capacity limits on a form that had 2 different fees so students could pay at a discount. For in-person events where space is limited, this is a crucial feature, and until it's back the event form is useless for us unless it's an online/Zoom event.