[rqs]

It can be worked around. For example, you can use those cookies just to initialize the client web browser. Once it's done, the data can be cached inside the localStorage, and the cookie itself can be deleted (Or changed to a marker that tells the server that the client has been customized).

Of course this may require some heavy changes on the client-side code, as the client now must have the ability to apply user's customization locally, but there are benefit: After you done that, then you don't have to read user's customization data from any of your infrastructure every time user reloads your page.