Tesla Model S is great, except

Try non-conformity under European law. Threaten to cancel the contract and follow through. Win your lawsuit. Make life better for all of us.

The point is that non-conformity suits often hardly have any stake. Why bother for €100. With a Tesla, it's different. Software regressing is clearly non-conform. And non-conformity is not related to the waranty periode either, but to the expected lifetime of a product. In case of a car, many years.

I think a ruling by the European court that software should be safe and functional throughout the expected lifetime would be the best that can happen for consumers.

Oh my god, nothing annoys me more than software features getting worse after software updates. Like the removal of swipe-to-unlock on latest iOS. Apple, you spent almost a decade training people to swipe to unlock their devices, and now suddenly you remove it. That's monumentally bad design.

If Tesla does the same, where software updates change usage patterns, then well - it only cements my decision to stick with more traditional manufacturers for now.

the ebooks issue, looks more like a different default configuration has superseded the old. Have you tried to change the options?