There’s no way to believe that phones have less cultural push than AM radio had pre-1990.

I mean, you can believe whatever you want, but the answer is yes there is.

You should watch the series Adolescence, btw. It deals with this exact topic. Its 4 episodes long and it shows how social media and constant connection and more importantly INTERACTION with everyone, has an effect that is fundamentally different from passively listening to AM radio.