Use-case is:
* Dual-boot where I choose in BIOS/UEFI to go to either the existing Win10 drive or new Linux drive.
* I don't need unattended boot at all, I'd rather enter a passphrase every time.
* Resistance to evil-maid attacks is nice but not top-priority compared to theft.
* I want to be able to take my drive out of a dead computer and access it elsewhere if something goes wrong, as opposed to needing to reformat and reload from backups.
* If I install a distro with secure-boot off, can I turn it on later for benefits, or vice-versa?