Re: User Experience
I believe Safari in iOS offers a "Limit Ad Tracking" setting, which prevents ad companies from targeting ads based on user behavior -- what's blocked is a unique identifier rather than the ad itself. But as far as I can tell, mobile Safari does not block ads.
As for ad blocking hurting users because the Internet runs on free content, that's debatable. We might just be better off if we had to pay for everything online. There would be less content, for sure, but the vast majority of that content would not be missed. Whatever survived would by definition be worth paying for.