Ok wanted to look at the actual states that mattered and the vote total difference just for fun:
Pennsylvania:
Trump- 3,378,263 Trump- 3,511,095 (+132,832)
Biden- 3,459,923 Kamala- 3,365,260 (-94,663)
Arizona:
Trump- 1,661,686 Trump- 1,656,356(+5,330)
Biden- 1,672,143 Kamala- 1,476,461(-195,682)
Georgia:
Trump- 2,461,854 Trump- 2,661,073(+199,219)
Biden- 2,473,633 Kamala- 2,544,311(+70,678)
Michigan:
Trump- 2,649,852 Trump- 2,804,647(+154,795)
Biden- 2,804,040 Kamala- 2,724,029(-80,011)
Wisconsin:
Trump- 1,610,184 Trump- 1,697,298(+87,114)
Biden- 1,630,866 Kamala- 1,677,881(+47,015)
Nevada:
Trump- 669,890 Trump- 730,242(+60,352)
Biden- 703,486 Kamala- 684,787(-18,699)
North Carolina:
Trump- 2,758,775 Trump- 2,878,108(+119,333)
Biden- 2,684,292 Kamala- 2,688,797(+4,505)
Here are some that were never going to flip this year but did have a big vote differential:
Florida:
Trump- 5,668,731 Trump- 6,109,443(+440,712)
Biden- 5,297,045 Kamala- 4,680,648(-616,397)
Texas:
Trump- 5,890,347 Trump- 6,375,362(+485,015)
Biden- 5,259,126 Kamala- 4,806,436(-452,690)
Cali both are down by 1 million plus but still a lot of votes to count. Then also obviously interesting that Dems won races in Arizona, Wisconsin, Nevada, and Michigan.