I voted for Trump last week, as there is nothing that could be said or done to convince me to vote for Clinton. There are plenty of people like me - on both sides.
It is frankly convient to put it in the mail, and not stand in long lines on a work day, that for me begins at 8:30 AM, and doesn’t end until 5 or 6 PM.
Unfortunately, many Clinton voters might have said the same thing last week and are now wishing they could change it. Internet voting where you have to log on to your ballot with voter ID and password but can change your vote any time before the cutoff would be convenient and flexible. Just need to move voter ID measures to Skype when registering to vote so they can check your image against your state DMV in real time before giving you your password/PIN.