I grew up in the time when you watched live television and Mom made use mute all advertisements because she hated how loud they were. (Advertisements were broadcast louder than the programs) When I was in someone else’s home that didn’t mute them I don’t feel like it made me pay attention to the messaging. That was still time to talk, get a drink, or use the facilities.

KDE Wallet is primarily a password manager. So if the launcher saves your password this is probably where it is storing it. Why invent your own storage when you can use one that is already built? For more information I recommend the ArchWiki which has plenty of information that is not arch specific. Also if you use Gnome I would imagine it would access Gnome keyring which serves the same function. KDE Wallet

If you have nothing backed up then you can just pretend the drive failed and you lost everything. Now you can just wipe the drive and install Linux.

They probably wanted a severe TOS update for you to agree to.

Linux is all about computing how you want. Remember that it is just a meme.

Ocean’s 11 is usually the example of this concept done right. The original was pretty bad.