(Quite a few people think my language was overly harsh. I'll reply to this one, but take it as read that it's much the same reply to all similar comments. Nothing personal, just this one seems to best sum up the (perfectly valid) criticism.)

Yes, indeed, it is a (very small) crime against humanity. (Not a BIG Crime Against Humanity, which sounds almost like a game of some sort.)

To be human is to have a hardwired hormonal stress response to this changed UI. It's something that evolved when we still lived up in trees. It's not something we can learn our way out of or train ourselves to not experience. And it is unnecessary, nay, inappropriate in a world already over-filled with stressors and noise.

And I would expect UI professionals to know about this and to avoid it except in places where a stress-response would be appropriate (time critical warnings, for example).

So I'll stick with the harsh language, thanks. As pointed out by some, it was not (and never intended to be) personal.

At the very least they could retain an option to disable to it, but no...

Sometimes I really miss my pre-internet computers, with software that was exactly the same every time I used it, until I decided that I wanted a new version.