TL;DR - This show is (overall) amazing and faces touch realities that other shows aren't willing to talk about.
Degrassi: TNG sheds a light on problems that a lot of people are facing, even though this was first created over almost two decades ago. For example, Marco faced homosexuality and Ellie struggled with self-harm and an alcoholic mother at home. People can relate to their honest realities, making this such a relatable, touching, heartwarming, and just beautiful.