Pop-up galleries designed for instagram selfie appeal, restaurant trendiness where one ramen place is the "internet approved" one and has an hour long line, and a place two blocks away with a different style - but not really worse, just not as trendy - has no line at all, etc - there are definitely ways in which there's more of a hive mind than ever. The meme popularity of bacon on the internet, even. For a more local example: growing up, Whataburger was just another Texas fast food option, not a tightly-held piece of people's online identities.

But at the same time, there's a lot of opportunities for increased individualism. You can buy clothes and furniture from far more places. You can much more exhaustively search restaurants. You have way more options in what you watch and listen to. Even the existence of "mainstream hipster" taste in movies is a change compared to just "maintstream" being a single thing.

So is personal taste really less present than it used to be? I don't think so, I think the domains just shifted around a bit.