Yeti I do think will go out of fashion is autotune as an overt vocal effect.
The more I think about it, the less likely I think it is gonna - hopefully pop(ular) music will shed most of the "new and shine-y" toy vibe and it'll be the home for 'rappers' that can't sing.
Cher's Believe was a 1998 release and well, 23 yrs later... 😬 What will break me ina couple decades is the nostalgia swing for the 2000's/2010's and there'll be a wholel auto-tune revival. Just when you thought it was over.
And that, will drive me to get a full stack. A nasty-ass Randall, just for Dimebag!