Came here to say this but you covered it pretty well! So I’ll just leave this image of steel being “cut” under an electron microscope. You can see the deformation and change in structure.

Dang, that’s a nice throwback.

TrueCrypt had/has that feature for full-drive encryption. But I don’t think anyone serious uses them anymore due to the current code maintainers having some questionable allegiances.

Not sure if you count nonprofits, but the Braille Institute has Atkinson Hyperlegible