The websites make it so hard to reject cookies or selectively accept to make the website work for your benefit.
Quick google search about the effects of the law shows various studies done so far to assess the positive impact it brought.
https://techcrunch.com/2019/08/10/most-eu-cookie-consent-not...
I think the USB-C mandate also going to result in a similar implementation by companies.
Apple already setting the trend by going to have only wireless charging for phones.