my 2015 70D is now 4yrs(+2mo) old, ~37600km.
home charge on a 120V/15A circuit, usually to ~65%. Plugged in nightly, but some days don't drive / don't charge.
now: 90% is 343km (~214mi) rated range
new: 90% was 346km (~216mi)
so just under 1% decrease in 4 years - nothing to complain about there