I don't want web advertising to go away.
The issue here is excessively intrusive tracking, not the ads themselves.
Otherwise how are Youtube creators, newspapers, Firefox, etc going to operate with out it?
Companies adding multiple megabytes of JS tools is probably another issue entirely as they often involve a variety of crap like 2-3 ad publishers, content recommendation services (chum), 5 different analytics and automation tools from "marketing", regulatory compliance modals/monitoring, e-commerce tools. And all of this is before the regular JS stuff is added (CNN for ex: adds both jQuery, backbone.js, AND React). Those issues are solved by competent web teams and for certain market segments of mega-firms this likely wont go away any time soon, so the ad blocks (really JS blockers) will remain.
Just like "defund the police" is a stupid self-alienating stance to stake, so is expecting web ads to end.
I haven't see the stats on retargeting, but I wouldn't mind that goes (across 3rd-parties).
But I do see some value in demographic and behavioural ad targeting. If I have to see ads then I'd prefer they be targeted at me. I'm not sure what the solution here is but, outside of pseudo-anonymization.
Because at the end of the day all that matters privacy-wise is identity. I could feed an ad engine locally with my attributes without directly revealing identity, as is largely the case today. But even that is a tradeoff.