She got 68 million, near enough, so there are 13 million Dems who voted in 2020 but not in 2024. They didn't vote Trump because his vote is down by nearly 2 million.
Well, yes, you would hope that the system is robust enough. It doesn't help that the Republicans in charge of the vote counting centres in several counties in the swing states banned federal count monitors from their buildings but, most likely, as has been hypothesised above, millions of 2020...