Even the digital upstarts ready to disrupt and replace them have all flopped now, having never actually had a plan beyond "i dunno what if web pages instead?". Huffpo sold for a dollar, buzzfeed shut down its news division, vice went bankrupt, gawker got murdered, mic and ozy were scams. gizmodo jezebel and deadspin run into the ground by private equity. Vox limps along aimlessly, the atlantic is an insipid clickfarm.
The recent drama at reddit is essentially the end of this trajectory/narrative. Magazines and local papers were places for communities to organize around and communicate with, we have subreddits for that (and other niche fora like the very one you and I are communicating on right now), but as the recent IPO related drama and layoffs have shown, there's baaaaaaarely a business model there. Serving communities that used to support hundreds of magazines with tens of thousands of paying subscribers. HN only works because its a glorified content marketing strategy for the epicenter of the zirp/vc bubble.
It makes sense that the internet changed everything. It makes sense that often the old things have to die for the new things to truly take over the ecological niche. The last 20 years has been the death of media (the content side) as a business. Theres not a ton of point in picking apart why any one given dinosaur like NG died. The internet-meteor did them all in.