They all started with a single "agree" button, then went to "agree/disagree" with no effect and are finally starting to come around to a functioning disagree button.
GDPR also helps here, as it defined what identifies an individual and that made most of the tracking PII even when it's all merged by a random ID that stays with the user. The effect is slow, but it's starting to work.
Hopefully the next step will be abandoning cookie banners and only using technically required cookies(don't need conset) and/or non-identifying tracking for aggregate results. This is a massive improvment on UX and actually gives the company more quality data that doesn't identify any single individual.
I'm personally pushing for aggregated tracking in my current company. It's an uphill battle, but one that can be won I think.
