1) debatable.
2) How far into the future is this?
3) Source?
LFP is commonly used in China for a while already and Tesla started using them in the US a few months ago. Tesla just developed the 4680 cell which has many new efficiencies. The first vehicles using 4680 battery cells were just delivered this month from the brand new gigafactory in Texas. Other technologies are always a work in progress.
I just did the math for someone based on rates in NJ. NYC electricity rates are higher, but there are options to lower your cost by charging off-peak.
$4.50/gallon ÷ 25 miles = $.18/mile
.15/kwh ÷ 3.5 miles = $.043/ mile.
This is quick math and the numbers may not be perfect, but you'd need to 3x the cost of electricity to start getting close.