In the full compose window the Bcc field is right below the To and Cc fields just where it has been for the past several versions.
Nope, since everything on iOS _has_ to go through the app store, and can't be sideloaded
This is not really true. IOS developers can sideload any app they wish as long as they sign it with their developer key first. You don't have to have access to the source code either, the code signing tool will happily let you sign any binary you want.
A developer key currently costs $99/year which is certainly not free but it is low enough that most people could afford it if they really want to sideload apps legitimately.
Apple also sells special code signing certificates to developers that are trusted for side loading on any device. They are often issued to companies that develop apps that are for internal use only to avoid cluttering up the app store with apps that are of no use to the general public.
Their is a set of strict requirements that you have to go through to obtain such a certificate but any app signed with such a certificate can be installed on any IOS device totally independent of the app store.
RAID won't protect you against data corruption...but time machine will.
Since when does Time Machine have any form of checksum or integrity check whatsoever? I have seen time machine backups that suffered from silent corruption and as a result were unusable. The drives themselves were fine but the data written to them was bad.
To protect against silent corruption you really need a backup system that uses a resilient filesystem like ZFS or ReFS which make extensive use of checksums to detect corrupted blocks and repair them from other copies. Typically those filesystems also require the use of ECC memory to ensure that transient memory errors doesn't cause any problems.
I was playing poker the other night... with Tarot cards. I got a full house and 4 people died. -- Steven Wright