I like it for social events or workshops, for example, where I may not want/need to be there at the beginning, but don't want my widget to be blank, as I'll probably forget the event exists!Maybe it could be a setting? I work 13.33 hour shifts and I prefer that calendar event disappear after 15 minutes because, well, I don’t need to be reminded all day that I’m there.
Makes sense for shorter events though.
Calendar 366 has a toggle on each widget "Show started events" so they do realise that not everyone is like me 😁. Actually, I assume most people don't want this feature as I don't see anyone else complain about it.