The web is already full of stuff that is free and is not ad-funded. There are already many services that have free versions with paid advanced versions.
If everyone used ad-block, it would change the web. In some ways for the better, in some ways for the worse. It wouldn't destroy it.
Well there is one option for funding websites. I'm sure ingenious people will come up with dozens more. Instead of how it is now where they are forced to squander their creativity making sites that are ad-funded.
Not all of the web is ad-funded, and it's just a matter of us giving that part of the web a chance.
If everyone used ad-block, it would change the web. In some ways for the better, in some ways for the worse. It wouldn't destroy it.