There is no legal requirement to have cookies so there is no legal requirement for any banners

And you don't need consent for cookies that are obviously required for normal site functioning like login etc.

Bang on. For example

A user visits an e-commerce website and decides to purchase a product. They add it to their shopping basket before continuing browsing for more goods they wish to buy. They then finish their shopping by going through the website’s checkout process.

The website uses cookies to ensure that when the user chooses the goods they wish to buy and clicks the ‘add to basket’ or ‘proceed to checkout’ button, the site ‘remembers’ what they chose on a previous page.

In this context, the cookie is ‘strictly necessary’ to provide the service the user requests and so the exemption would apply and no consent would be required

We all cheer for Max Schrems to teach these companies that misconstruing cookie banners as complying with EU regulations is a risky play.