>but I wonder if someday we'll look back on the era where web content was paid for by the 90 percent of people who don't block ads so the 10 percent could block them effortlessly as a sort of golden age.

Yes! I think what has staved it off is the lack of adblocking on mobile devices. I use uBlock on every computer I have, but on my iPhone? Not so much. I think as more traffic moved to mobile it has offset ad blocking to some degree. I can't imagine that 25% of people are blocking ads on mobile?