I had an encryption requirement at both Oracle (for Windows) and Canonical (for Linux). For Windows they used some endpoint protection suite; for Canonical the functionality is built-in to the Ubuntu installer.

Also since I own a Mac as my primary laptop, I've just always used filevault there and it helps me sleep a lot at night. Means I am not concerned if it gets stolen, my derpy photos won't be in someone elses hand. I don't care so much about the hardware.

For Ubuntu, are you referring to LUKS or /home/user encryption?

If you want protection from someone booting up your computer in single/rescue mode to read/modify files you'd have to encrypt the entire disk (using LUKS, for example).

Doesn't matter, both of them are offered by the OS installer and are easy to set up.

FYI: only full disk encryption is available now in 18.04:

"The installer no longer offers the encrypted home option using ecryptfs-utils. It is recommended to use full-disk encryption instead for this release." https://wiki.ubuntu.com/BionicBeaver/ReleaseNotes#Other_base...

Are you even talking about GNU/Linux? Most of the comments in this thread have been about MacOS and Windows, and I made no claim regarding those.

FDE with LUKS/dmcrypt has been an out-of-box installer-supported mode in all the major distros for a long time now.