You can play Witcher 3 at 96:9 for a 32:3 view.
You can play Witcher 3 at 96:9 for a 32:3 view.
Technically; 96:3, unless your display uses a 3x3 grid. I understand that to reach the "96" setting, you might need your graphics card to push 96:9, but this isn't what actually appears.
Sure, you can create any ratio on your own using the widescreen fixer.
It looks like the CDPR designed a system capable of handling any aspect ratio and resolution. That's impressive—many engines, both old and new, already manage similar things.