On the evening of Dec. 7, six teams of mechanical engineering students presented the product prototypes they developed this semester in class 2.s009 (Explorations in Product Design), a special version of class 2.009 (Product Engineering Processes). For many MIT seniors, their entire undergraduate experience culminates in these final presentations. But this year, there were no guarantees. “I spent three years wondering if 2.009 would measure up to the expectations I had. And then the pandemic hit, and essentially my hopes were dashed for the quintessential ‘009’ experience,” says Isy…