> Most of the Model S and X chassis is aluminum, and will experience longer longevity than traditional steel frame vehicles. maybe with regards to weather/corr

> Most of the Model S and X chassis is aluminum, and will experience longer longevity than traditional steel frame vehicles. maybe with regards to weather/corrosion resistance, but no where in the automotive world does aluminum offer greater 'longevity' than steel mechanically. aluminum is brittle, and gets more brittle. it's trickier to weld, and most fasteners that interface with it are supposed to do so with a compatible metal insert rather than a threaded surface, creating even more issues and higher part counts. elastic modulus is hugely beneficial to the longevity of metal parts on a constantly torqued structure. aluminum vintage race cars are generally subject to more comprehensive frame and suspension inspection pre-sale and pre-race for this reason, it doesn't fail gracefully like a similar steel part. All that said, I get why Tesla likes aluminum. It's great. I love it, too. But I think that selling it with the idea of longevity isn't entirely honest in any regards besides corrosion/road salt resistance; and aluminum isn't even that great at that.