I can't speak about the solar eclipse specifically (though, my drive in an ICE vehicle during that went from what should have been a 4 hour drive to 12 total),

I can't speak about the solar eclipse specifically (though, my drive in an ICE vehicle during that went from what should have been a 4 hour drive to 12 total), some events do cause backups at chargers. Recent examples would be the SpaceX launches (example, though this is not bad at all: https://steemit.com/tesla/@geeklad/spacex-launch-causes-congestion-at-palm-bay-supercharger-in-florida https://steemit.com/tesla/@geeklad/spacex-launch-causes-cong...), which probably have an unusually large number of Teslas in attendance. Hopefully Tesla can keep up with building out superchargers but they'll obviously never optimize for the largest possible burst.