> That's illegal under the GDPR [..]

So what about sites that claim that certain cookies are necessary for operation of the site, when that's at best bending the truth and at worst an outright falsehood?

Many sites work perfectly well and - amusingly - become blazingly fast once you block all scripting and cookies. No annoying GDPR notices, no annoying ads, no (client-side) tracking. So much for "necessary" cookies :/