[int_19h]

Such arrays are an extremely common pattern in low-level code regardless of language, and so is iterating them in parallel, so it's natural for Zig to provide a convenient syntax to do exactly that in a way that makes it clear what's going on (which IMO it does very well). Why does it make your eyes hurt?

[timewizard]

It looks to me like:

   for (one, two, three) |uno, dos, tres| { ... }

My eyes have to bounce back and forth between the two lists. When the identifiers are longer than this example it increases eye strain. Maybe it's better when you wrote it and understand it, but trying to grok someone else's code, it feels like an obstacle to me.