That doesn't seem like a mystery to me. The argument in favor of tabs boils down to "tab damage won't happen". The argument in favor of spaces boils down to "

That doesn't seem like a mystery to me. The argument in favor of tabs boils down to "tab damage won't happen". The argument in favor of spaces boils down to "tab damage will happen". I know which of those two philosophies I would prefer to have in charge of important things.