Quote (Thor123422 @ 2 Feb 2020 20:15)
The older generations didn't need to be as skeptical of the media. With deregulation in the 90's the profit motive for media companies dominated and we saw the birth of the modern cable news station, with Fox being the most extreme example. People born around then have grown up with hyper-partisan news and most notably the internet and have been trained to be more skeptical of media in general. Additionally as cords are cut and older generations die we will see a greater decline of cable news. However, it's most likely to be replaced with other partisan sources founded on social media. So I'm not sure it will get better.
I think it's not just the media landscape. All the things you listed played a big role in the emergence of hyperpartisanship, but imho, there are additional factors. The divides found in the American society are largely playing out as well in other Western countries. Imho, aside from the media factors, the largest driver of this polarization is globalization, which has divided western societies in winners and losers, both economically and culturally.