True ...to an extent.. One of the weight savings is the rear engine hatch glass (gorilla glass) is replace by vented acrylic . Also you get a small 2 piece screw- together pencil-post to hold up the rear hatch in place of the one hydraulic cylinder. Also the hatch release is deleted and replaced with simple hold down latches like what are used on the race cars.
The big savings in 2018 came from deleting the A/C and the Electronic screen , navigation , radio etc.
But FMVSS standards now require , beginning in 2019 MY, that ALL vehicles come equipped with rear view cameras and thus the screen and electronics needed to be added back in .
I think adding back the Air Conditioning was just 'common sense".
andy (ajb)