Here is what I wrote back in February.
If at character creation, it would just be like selecting hardcore/softcore, ladder/non-ladder, and would be a separate game mode. You can not play a hardcore character in softcore. Your non-ladder character can not play ladder. Separate game modes.
I said A or B back in February. Since I have realized that A is not an option for some time, I have consistently advocated for B afterwards.