You can do a crude projection by extrapolating from the individual counties and assuming that the remaining votes in each county will be the same % Biden/Trump as the already-counted votes. Crude because they are mostly down to counting mail-in ballots now and these tend to lean more towards Biden than the walk-ins afaik.
On this analysis (which I did), Biden wins AZ by 65k. Trump win GA by 45k, and PA by 60k, and NV is projected Biden by 12k so could end up being close. Depends on how much the remaining numbers keep the pattern of the current numbers. Got tired of it and didn't bother to do NC, but since NC is currently Trump with 80k lead, and has counted more votes than GA (where Trump is only ahead 20k), I assume GA will go Biden before NC, in which case what happens in NC would be academic.
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