Dewalt is maintaining the 18V lineup but will probably eventually convert everything to the 20V Max lineup. They insist that they will keep selling the 18V tools as long as there is user demand for them.But if all your 18V tools are available in the 20V Max lineup, and your buddy is willing to but the whole 18V lot from you...Many/most of the 20V versions do feature improved ergonomics, features, or specs.