This is what I was wondering too, but it’d need to be pretty far off to drop it from 240 to 192.
But it seems like in all Model 3 there’s definitely some weirdness going on with the screen indication of what’s usable verses what the EPA application says. No one is seeing 55kWh nor 78kWh.
Is it possible there's a large bottom buffer? Elon tweeted this in May 2018: Elon Musk on Twitter
"A Tesla has a usable reserve of 5 to 15 miles range even after the battery reads “empty”. This will not hurt the pack."