The dealer did a rust proofing undercoat and then they treat all the drain openings with a different product. 7 year warrant. It’s transferable.
2020 Prime is great. So far, I have used a minimal amount of gasoline in the week I have driven it. Car Play has worked well. Not sure Entune works or that I need it. I did charge the Traction battery while on the interstate and I initially got a “plastic” smell but that has gone away.
You added the roll-out rear cover, right? I bought a roll-out cover just in case but I don't think I'm going to use it. After using the cloth cover I kind of like how it automatically moves out of the way when I open the hatch.