I grew up in the 90s. Its not like all our media was Tolstoy. But for my cohort it was very normal to read young adult literature - which meant books with 100s of pages, or video games that were elaborate, challenging, and demanded imagination and focus. The shortest media we consumed was 30 minute sitcoms. We got aesthetics, narrative structure, problem solving, focus - and maybe even some semblance of values.
Today, and I can hardly believe it, it really seems to be the case that the average teenager has read zero books cover to cover, or even fully watched a movie as difficult as ET. What she has done, is consumed hundreds of hours of twitchy bizarre quasi-algorithmic video content through a blaring handheld terminal thats held more intimately than any friend or pet. Far from being content made with artistic integrity or true dedication to the fostering of the young, this stuff is more akin to direct neural stimulation.
What I don't understand, is why anyone would think that such a shift would result in anything other than marked mental deterioration.