> Using that procedure, two of the largest states in the US have failed to complete counting their votes in time for an election to be called for a particular candidate, several times over the past four years

I'm not even sure what “failed to complete counting their votes in time for an election to be called for a particular candidate”; are election results perishable such that of a count takes too long it no longer counts? Specific examples of the phenomenon you are discussing would perhaps be useful.