It definitely was the last chance I saw a lot of folks.

Yeah, I know, that means I wasn't intentional enough yadda yadda yadda, but high school really was the last time a lot of folks are in an environment where social interactions are so passively encouraged. After high school, you're no longer pressured to keep in touch with folks that you've known for 4, 6, or even 12 years, and a lot of people do naturally fall out of touch.