I'd say I'm not so much grew out of it, I just got too fed up with the cliches. Nowadays I find manga being much more interesting than anime, and with a better plot usually.
Well, the detail that you have to be glued to the screen to understand what's going on. I nowadays watch the shows while simultaneously doing something else to both save time and not being bored while working. Anime is virtually impossible to watch that way because subtitles.
But I do noticed that after roughly 2010 it became "one interesting show in several years" rather than "a couple of interesting shows per year".
You monster, 90% of the good stuff considered classic came out before 2000! You dare deprive your brother of Cowboy Beebop, Akira, GITS, and other works that are the sole justification for the existence of the medium?!