All votes haven't been counted yet, but as of right now, this graph checks out for being a few hours old.
2020
81m (D) +74m (R) = 155m votes in total
2024
66m (D) + 72m (R) = 138m votes in total
If the 15m missing Democratic voters went over to vote for Trump, I can at least understand their reasoning.
But as of now around 15 million of the Democratic voters essentially just decided not to vote.
Best to do this comparison after all votes have been counted though. It might allign a bit closer in the end, but man...