Interesting. I absolutely would horrify people. Especially children. Like ruining their sleep. Mess with them until they are admitted to the funny farm. Grow a habit out of that and do that over and over again, in different areas of the world until I become a legend of a nightmare that actually comes true.

I think it is, especially when the default doesn’t communicate well with a different ecosystem (Android vs iOS). So installing a app that gives you more features than plain text and works with all relevant mobile os worlds absolutely makes sense.

I am from Germany

I would presume so. Both contain aspertame, and afaik this is the reason why they say it is carcinogen. So very much „diet“ stuff and sweeteners has this in, you should be careful.