Traded in my 2015 Leaf for more miles from the 2018 version. Gunmetal Gray SV with technology package. Loving the ePedal. Just think i have old maps because they display as 16-17. Nissan is of no help to answer other than to say buy 2018 maps.
All that's involved is downloading the software to an SD card and plugging it into your car. There wont be any need for technicians to do these kinds of updates in the future. For the most part automakers will probably be able to push these updates over the air.