I am really curious and I haven't found satisfactory answer in similar questions.
When deleting all of my cookies, I am still perfectly able to access my admin dashboard - why am I not returned back to login page and required to authenticate again? Why is it different in WordPress than in most other CMSs that deleting cookies still keeps my admin session valid somehow? Can someone explain to me in more details how and why this works this way?
To add additional explanation, when I clear cookies, top user/admin bar is no longer there (this is expected). However, if I directly access some wp-admin page (via bookmark, for example), then the bar is back and I can do anything I normally do as logged-in admin user.