Curiously, the photo of the screen shows slashed zeros, while the font sample shows non-slashed zeros.

I noticed the same thing. It's the first thing I check when someone describes a font as "legible." I want to see O0olI|i diplayed.

The photo actually shows some slashed and some non-slashed zeros too. Look at the PSI numbers on the left versus the time numbers in the center right.

That doesn't seem great from a UX standpoint.

codepoint E007 is a slashed zero... would be interesting to know why this is not the default

strangely its not included in the regular font face... only in the italic, bold, bold italic and monospace variant

0123456789