I have to disagree with that.
" all that means is there'd be 52 numbers" but that simply doesn't address how all those numbers are obtained. Describing how it OUGHT to work is interesting speculation, but when different states don't WANT it to work the same way, it's irrelevant.

"they could do the top one for President, and set the the ballots aside for the rest to be counted later."... umm.. set aside what? Paper ballots? Handle each ballot at least twice..maybe several times? Set aside where? Guarded by whom?

   Sorry, but it IS a matter of an antique constitution...and you simply can't refer to "lack of will" as a trait of a nation as a whole. There is lack of desire for many. The current system is an advantage to conservative states whose majorities fear 'sensible' procedures! I spent time in Mississippi in 1964 in protest of those resisting "sensible procedures" which would have allowed blacks to vote! Remember, the South tried to BE a separate country.
(You have many in England who would love to exclude recent immigrants ... and in Germany, it is even worse. It's just that there's nothing similar to 'states rights' to keep Essex & Kent from writing their own rules.
And as I type Biden's margin has gone up from 4.1 million to 5.2 million. It's one small step...