Just to add a little detail about working with stainless: contamination. You have to use separate tools between carbon steel and stainless steel, and even dust

Just to add a little detail about working with stainless: contamination. You have to use separate tools between carbon steel and stainless steel, and even dust contamination between carbon steel work areas and stainless steel work areas can cause contamination on the stainless steel, which leads to rust. I have no idea how they're going to keep the stainless from corroding in states that use salt for the roads in the wintertime. I was a project manager on many jobs fabricating stainless steel pipe, and we had to go to great lengths to prevent contamination, including shrink-wrapping every piece, in addition to using covered loads to prevent contamination from road salts. That's tangential to the manufacturing difficulties, but I have no idea how Tesla will respond to owners' rage over rust on their cybertruck after one winter.