You know things are getting closer to normal at MIT when people gather at Kresge Auditorium to celebrate student entrepreneurs. That was the case Friday at the delta v summer accelerator’s capstone event, Demo Day. None of the students who presented their startup success stories could have predicted the changing pandemic landscape they’d have to work through this summer. But the presentations — each interspersed with enthusiastic cheers from the audience as students announced company milestones — showed they were able to adapt. “Everyone’s impressed, not only with the problems…