And ad blocking. Don't even get me started. So many ad blockers are so proud of what they do, like it's some badge of honor to block. If everyone blocked ads, many quality web sites would likely cease to exist, including Slashdot.
I suspect in reality that the best sites would continue, but there would be a lot more paywalls around, probably less editorial integrity on open sites as things like product placements and affiliate referral fees became more reliable revenue streams, and maybe over time we'd eventually get somewhere with micropayments. In some ways, moving to more "honest" funding via paywalls and/or micropayments might be a better long-term model for the people who do produce good content and run valuable sites than what we have today, though no doubt it would be a painful transition with many casualties.
The thing that makes me a little sad inside is that the aggressive, irresponsible advertisers have spoiled the model for the moderate, responsible ones. Because of the former group, I do block very aggressively when I'm browsing, and I don't feel any guilt about it because my motivations are security, privacy and performance. However, I also have no problem with people who just want to make a bit of money from running a decent site, and I wouldn't block their ads if there were a reliable way to allow those while still eliminating the rest. Unfortunately, I don't see that being possible any time soon, which is why none of the commercial sites I've ever run myself has relied on ads as a business model.