Maybe I’m reading the article wrong but if now you can opt out of cabin luggage for a cheaper price… what changed? I mean that’s the case already for Ryanair and co. Want bags? Pay more.
Your WhatsApp's user ID is your phone number, so it makes sense to be able to use WhatsApp directly whenever you have a "Call" button somewhere in the UI. Same for messages.
I don't know about the US, but in the EU almost all other brands have some kind of mandatory maintenance (and may void warranty if not performed on time) that may catch certain issues before the periodic inspection. Tesla is famous for not having a maintenance plan.
For EVs in particular, you almost never have to use the brakes, and if you don't burnish your brakes from time to time, the rotors may end up rusting or worse, especially in northern counties that use road salt in winter.
Some other well known issues with Model 3s and Ys are poor headlight height calibration and upper/lower lateral links that fail way too early.
The thing with all of these issues is that most Tesla owners are told that they don't need to perform any maintenance, and while that may be the case, you should at least inspect your car from time to time to detect these issues. You can even do most of this on your own (brake burnishing each year, headlight calibration, and more).