Cookies bisect into useful state for session management and all the other truly awful uses. Unfortunately it's impossible to avoid "the evil bit" problem and you cannot a priori know it's a useful or useless cookie.

QUIC session state has potential but I believe won't end the dependency. If you don't keep state in the browser side and you want either idempotent or portable state outcomes you have to have a three way rendezvous to restore prior state into a new binding.

Tracking is shit but some cookies are purposeful