Assurance from program suppliers that their "improvements" will be so smoothly implemented that you'll never notice the change have to be assumed to have come from the advertising department rather than from anyone capable of providing technical advice.

Unfortunately Microsoft's advertising and promotional departments now seem to have grown past the point where anyone who knowns anything about how their stuff works appears unlikely to have much voice in what the users should be told.

I had little difficulty with the switch to IE10, but I don't contend with needing multiple browsers and don't have many places where I don't, by choice, do manual logins anyway, I wouldn't be likely to notice loss of cookies except for a very few of them. My few places where cookies are used to identify me don't say what causes a need for more than usual login steps, but just go to "second step" authentication - and sometimes to a third all automatically.

"Tossing your cookies" seems like something that should not have happened, but after all it was Microsloth, so maybe some allowance is required based on reasonable expectations ... (?).

John