[MoonWalk]

The "code" version:

  Capital "i" has crossbars? CHECK

  Zero is distinguishable from O? CHECK

"Text" version:

  Capital "i" has crossbars? NOPE, so no dice.

I hate fonts that don't have a properly-formed capital "i".

[FaceType]

In sans-serif text typefaces capital ‘I’ is traditionally a simple vertical rectangle without serifs. But we were estimating some folks would miss those serifs so if you want to have a ‘properly-formed’ capital ‘I’ just activate stylistic set 02 (ss02, = ‘Alt I J i j r’). To see what this looks like, take a look here: https://www.monolisa.dev/tester/text

[MoonWalk]

Thanks for the reply, and that option. Pretty cool!

But the crossbars aren't serifs!

[FaceType]

You are correct. But the letter ‘I’ never has crossbars, no matter what font you are looking at. If you mean the horizontal stem, that is a serif.