If Biden won by 30, which won’t happen, he’d win every single state. Don’t assume a uniform swing in blowouts like that because at a certain point the Dem margin is maxed out. It’s even somewhat of a risky assumption (though a good baseline) with a 10 point margin.
If Biden won by 30, I'd be 90% sure that he loses at least two of WY, OK, WV, AL, these states wouldn't flip unless Biden won by 40 or 50, which would be a landslide of unprecedented proportions, only in one contested election in 1804, has a candidate won the PV by over 37%. In that election, the Federalists still won two states (CT and DE), no candidate is getting a 50 state sweep, unless they are actually unopposed. In 1820, even though Monroe was unopposed, he actually lost Massachusetts in the PV to Federalist electors, but still won their EV's. Not to mention, these elections were in far-less polarized times, even if Trump was absolutely blown out, he would still win at least 1 ruby red state.
